Computeruser.com
Latest News

Dictionary

Dictionary-Words

All | # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | Submit a name

There are 220 names in this directory beginning with the letter L.
L1 cache

A level 1 (L1) cache is a memory cache that is built into the CPU chip. A fast transfer speed for a memory bus, the conduit between the CPU and main memory (DRAM), is 66MHz. The L1 cache is a small, fast memory area that works together with the L2 cache to provide the CPU much quicker access to important and frequently-used data than searching the main memory.

L2 cache

A level 2 cache (L2) is a collection of memory chips on the motherboard. The L2 cache is a static RAM secondary memory area which is slower than the L1 cache but faster than main memory. An L2 cache is typically 256KB or 512KB. Increasing a level 2 cache may speed up some applications and have no effect on others. The L1 cache and L2 cache are used together.

LaborNet

A network sponsored by the Institute for Global Communications for the purpose of improving worldwide communication on labor issues and gaining fair conditions for workers.

lambda-calculus

A system of mathematical logic Alonzo Church originated in the1930s, which concerns the application of functions to their arguments. Lambda-calculus and its variations have been important in the development of computer programming languages.

LAN

Local Area Network. A network that connects computers that are close to each other, usually in the same building, linked by a cable.

LAN emulation

A technology that uses asynchronous transfer mode to connect Ethernet and Token Ring networks together.

LAN Manager

Microsoft's network operating system for DOS, Windows, and OS/2.

LAN manager

The person who manages a local area network.

LAN station

A workstation in a local area network.

landing zone

An area on a hard disk where the read/write head lands when the disk stops rotating. No data is recorded in the landing zone.

landline

Traditional wired telephone service, rather than wireless service.

Landmark rating

A benchmark for PCs that measures CPU and coprocessor speed and video performance.

landscape

A way of positioning a page so it is wider than it is high, as in landscape painting. A computer printer usually gives the user a choice between landscape and portrait orientations.

language

A set of symbols that are used to communicate information, including rules for how the symbols are used.

language based editor

A computer program which is designed to help the user write and edit programs in a particular programming language. The editor has the rules of the language built into it, and can check for mistakes as programs are written or edited.

language processor

Software that performs language translation.

language-sensitive editor

A computer program which is designed to help the user write and edit programs in a particular programming language. The editor has the rules of the language built into it, and can check for mistakes as programs are written or edited.

LANtastic

A LAN system for DOS, Windows and OS/2 from Artisoft, Inc.

LapLink

A program from Traveling Software, Inc., that transfers data between laptops and desktop computers.

laptop

A portable personal computer that is small enough to fit in a person's lap. and weighs less than eight pounds. Laptops usually have a flat screen and LCD display, and are powered by a rechargeable battery. They can be connected to a larger monitor or other peripherals when back at the office.

laptop computer

A portable personal computer that is small enough to fit in a person's lap. and weighs less than eight pounds. Laptop computers usually have a flat screen and LCD display, and are powered by a rechargeable battery. They can be connected to a larger monitor or other peripherals when back at the office.

large-scale integration

(LSI). The use of integrated circuits with more than 100 logic gates. Fourth-generation computers have large-scale integration.

laser

light amplification through stimulated emissions of radiation
A device that uses the oscillation of atoms or molecules between energy levels to generate a narrow, finely focused beam of light. The light has a single wavelength or narrow spectrum of wavelengths and is matched in phase and frequency. Lasers are used in fiber-optics, laser printers, CD-ROM players, and scanners.

laser beam

The beam of light produced by a laser, which can be precisely focused and can travel great distances without much loss of power.

laser beam printer

A high-speed, non-impact printer that uses a laser beam to form images on a page. Laser beam printers produce high-resolution, high-quality printouts.

laser disc

(LD). An optical disc which stores information that can be read by a laser beam. Laser discs can be used to store data, but are usually used for video and audio together. Laser discs come in 8″ and 12″ diameters. Information can be stored in constant linear velocity or constant angular velocity format. The 8″ laser discs can hold up to 20 minutes of video per side; the 12″ size holds up to 60 minutes per side.

laser printer

A high-speed, non-impact printer that uses a laser beam to form images on a page. Laser printers work like photocopiers to produce high-resolution, high-quality printouts.

LaserDisc

A trademark of Pioneer Electronics USA, for its laser disc products.

LaserJet

A series of laser printers from HP, beginning with the first desktop laser printer in 1984, which revolutionized desktop publishing. Color printers are now available.

LaserWriter

A series of desktop laser printers from Apple.

Last In First Out

(LIFO). A method of storage in which the data stored last will be retrieved first.

Last In Last Out

(LILO). A method of storage in which the data stored last will be retrieved last.

LATA

Local Access and Transport Area. A geographical area designated by the telephone company, usually having the same area code.

latency

1. The time lag between the beginning of a request for data and the moment it begins to be received. 2. When reading data from memory, the number of processor cycles per bit delivered. 3. The time necessary for a packet of data to travel across a network. 4. The time it takes for the light emitted from a phosphor on a display screen to dim.

LaTeX

Lamport TeX. Document preparation software; a variation of TeX.

launch

To load a program and start it.

LAWN

Local Area Wireless Network. A technology from O'Neill Communications, Inc., for wireless networking using a radio transmitter/receiver.

Lawrence Livermore National Laboratory

(LLNL). A science and engineering research laboratory operated by the University of California under contract with the U.S. Department of Energy.

layout

The design and formatting of a page for publication. Layout used to be done by manually laying the elements of a page in place and fixing them to the page with wax. Now most layout is done onscreen, using a computer program, and there may never be a hard copy of the page.

layout settings

Settings used to format a page for publication, which can include such specifications as margins, indents, column widths, word wrap, and tabs.

LB

Low Battery. A modem status signal indicated by a light on the modem.

LCC

1. Leaded Chip Carrier. A square chip package with pin connectors on each side. 2. Leadless Chip Carrier. A square chip package with flat contacts, instead of pin connectors, on each side; also abbreviated LLCC. The leadless chip carrier is easier for the user to install. The user puts it into a specially designed socket and closes a clamp to establish its connections.

LCD

Liquid Crystal Display. A type of display used on digital watches, calculators, and laptop computers. LCDs are lighter and consume much less power than other computer displays. Liquid crystals are rod-shaped molecules which spiral when they are exposed to an electrical charge. Polarized light passing through the layer of liquid crystal cells is twisted along the spiral path of the molecules. The light then passes through a series of filters which block light vibrating at certain angles and allow light vibrating at other angles to pass through; thus the color of each pixel can be controlled.

LD

Laser Disc. An optical disc which stores information that can be read by a laser beam. Laser discs can be used to store data, but are usually used for video and audio together. Laser discs come in 8″ and 12″ diameters. Information can be stored in constant linear velocity or constant angular velocity format. The 8″ laser discs can hold up to 20 minutes of video per side; the 12″ size holds up to 60 minutes per side.

LDAP

Lightweight Directory Access Protocol. An online directory service protocol defined by the Internet Engineering Task Force (IETF) which is a simplification of Directory Access Protocol (DAP). An LDAP directory entry is a collection of attributes with a unique identifier, called a distinguished name (DN). The directory system is in a hierarchical structure. See also X.500, DAP, DN.

LE

Less than or equal to: <= .

lead acid battery

A kind of rechargeable battery that has been used in some portable computers. It uses lead plates with an acid electrolyte. The lead acid battery provides less charge per pound than the nickel cadmium or nickel hydride batteries.

leaded chip carrier

(LCC). A square chip package with pin connectors on each side.

leader

1. A line of dots, dashes, or sometimes other symbols used to lead the reader's eye across a page, such as in a menu or table of contents. 2. A section of blank tape used to thread a tape up to the point where it begins recording or playing.

leader tab

A tab that has a leader (a row of dots, dashes, or other characters) preceding the tab entry.

leading

The vertical spacing between lines of type or other design elements, usually measured from baseline to baseline. In early linotype machines, the space between lines was made with bars of lead. Leading is measured in points; standard leading is 120% of the height of the text. So a 10-point typeface would normally have 12-point leading; however, leading can be adjusted to any desired setting. Simple word processors allow only for single-spacing, double-spacing, and space-and-a-half; more sophisticated type programs allow finer leading adjustments.

leading zeros

Zeros on the left side of a number, used to fill in a field; they have no effect on the value of the data. For example, the zeros in 000054.

leadless chip carrier

(LCC or LLCC). A square chip package with flat contacts, instead of pin connectors, on each side. The leadless chip carrier is easier for the user to install than the leaded chip carrier. The user puts it into a specially designed socket and closes a clamp to establish its connections.

leaf

1. In a hierarchical file system, a file on the lowest level. The hierarchical file system is described as a tree with a descending system of directories similar to roots, branches, and leaves. 2. The last node of a tree in database management. 3. A sheet of paper in a document; each side of the leaf is a page.

League for Programming Freedom

(LPF). A nonprofit organization dedicated to “bringing back the freedom of programmers to write programs,” in the face of the recent trend toward complicated copyright and patent lawsuits. Address: 1 Kendall Square #143, P.O.Box 9171, Cambridge, Massachusetts 02139 U.S.A. (http://www.lpf.org/).

leapfrog test

A self-replicating diagnostic routine for checking the capacity of storage media such as disks and tape.

learnware

Educational software.

leased line

A dedicated line that is leased exclusively to connect two points, 24 hours a day, 7 days a week. A leased line gives the highest-speed connection.

leased line modem

A high-speed modem used on a private leased line. It may also be used for dial-up connections, for which it must use a lower speed.

least significant bit

(LSB). The bit of a binary number which is farthest to the right, indicating the number of ones; also designated as bit zero.

least significant digit

The significant digit which is farthest to the right in a number.

LED

Light-Emitting Diode. A type of semiconductor diode that emits visible or infrared light when current passes through it. Visible LEDs are used as indicator lights; for example, the light that shows a computer or printer is turned on. Infrared LEDs are used in remote-control devices.

LED printer

A printer which is similar to a laser printer, but uses light-emitting diodes in place of the laser.

left arrow

A keyboard key which has a picture on it of an arrow pointing left; it moves the cursor to the left on the page.

left brace

ASCII character 123: { .

left bracket

ASCII character 91: [ .

left click

Clicking the left side button on the mouse.

left justified

Aligned on the left margin; same as flush left.

left paren

ASCII character 40: ( . Also called left parenthesis.

left parenthesis

ASCII character 40: ( . Also called left paren.

left tab

A tab that has left alignment. The text is aligned on the left and extends to the right of the tab stop.

legacy application

An application that has been in use for a long time, usually on a mainframe or minicomputer.

legacy system

An information system that has been in use for a long time, usually on a mainframe or minicomputer.

legend

Explanatory text on a chart, map, or illustration.

Lempel-Ziv compression

A data compression algorithm developed by Jacob Ziv and Abraham Lempel.

Lempel-Ziv Welch compression

LZW compression. A compression algorithm designed by Terry Welch based on the LZ77 and LZ78 compression techniques developed by Jacob Ziv and Abraham Lempel. LZW compression is used for both archiving and transmitting files.

less than

ASCII character 60: < .

letter quality

(LQ). Printing quality as good as, or better than, the best typewriters. Laser printers produce letter quality printing, and some inkjet and dot-matrix printers do also.

letter quality printer

A printer that can print letter quality; in other words, quality as good as that of a good electric typewriter.

letter row

On a keyboard, a row of keys that has mostly letters.

letterbomb

An electronic mail message that contains some code that is intended to do harm to the recipient's computer.

level 1 cache

A level 1 (L1) cache is a memory cache that is built into the CPU chip. A fast transfer speed for a memory bus, the conduit between the CPU and main memory (DRAM), is 66MHz. The L1 cache is a small, fast memory area that works together with the L2 cache to provide the CPU much quicker access to important and frequently-used data than searching the main memory.

level 2 cache

A level 2 cache (L2) is a collection of memory chips on the motherboard. The L2 cache is a static RAM secondary memory area which is slower than the L1 cache but faster than main memory. An L2 cache is typically 256KB or 512KB. Increasing a level 2 cache may speed up some applications and have no effect on others. The L1 cache and L2 cache are used together.

lexeme

The minimal lexical unit of a language, whether a natural language or a computer language.

lexical analysis

The first stage of processing a computer language, in which a lexical analyzer reads the input and groups characters into lexemes (elemental units of language), which are then sent on to the parser.

lexical analyzer

A program that analyzes computer language input and groups the stream of characters into wordlike units called lexemes. The output of the lexical analyzer is next processed by the parser.

lexicographic sort

A sorting of items in alphabetical order.

Lexmark

Lexmark International, Inc. A company that manufactures dot matrix printers, keyboards, and related products.

LF

1. Line Feed. Feeding the paper through the printer just far enough to print the next line. Also, a button or computer instruction that activates a line feed. 2. Low Frequency. Electromagnetic frequencies in the range of 30 to 300 kiloherz.

LHARC

A shareware/freeware compression and archiving program developed by Haruyasu Yoshizaki. Compressed files have the extension .lha.

li-ion

Lithium-ion, a long-lasting type of rechargeable battery used in portable computers. A lithium ion battery can go four or five hours without recharging.

license agreement

A legal statement which indicates the terms under which a user may make use of a software product. The license to use does not transfer ownership. In many cases the license is worded so that installation or use of the product indicates agreement to the terms stated.

LIFO

Last In First Out. A method of storage in which the data stored last will be retrieved first.

ligature

Two or more type characters that touch, used especially in book typesetting. Some common ligatures are ff, fl, ffi, tt, ae.

light pen

A light-sensitive pen pressed against a touch screen for drawing or communicating with the computer.

light waves

Light has wavelengths between 10 nanometers and one millimeter, which spans from the infrared to the visible spectrum to the ultraviolet range.

light-emitting diode

(LED). A type of semiconductor diode that emits visible or infrared light when current passes through it. Visible LEDs are used as indicator lights; for example, the light that shows a computer or printer is turned on. Infrared LEDs are used in remote-control devices.

Lightweight Directory Access Protocol

(LDAP). An online directory service protocol defined by the Internet Engineering Task Force (IETF) which is a simplification of Directory Access Protocol (DAP). An LDAP directory entry is a collection of attributes with a unique identifier, called a distinguished name (DN). The directory system is in a hierarchical structure. See also X.500, DAP, DN.

lightweight protocol

A simplified communications protocol.

LILO

Last In Last Out. A method of storage in which the data stored last will be retrieved last.

limited distance modem

A modem that can send communications for short distances, usually about a mile.

line dot matrix printer

A printer that prints one line at a time and uses the dot matrix method.

line drawing

A drawing made by solid lines outlining a figure. Line drawings are the simplest images in computer graphics, as they require only black and white (or one color and white). Images which have subtle shades are called grayscale images.

line driver

On a private communications line, a device that increases the possible transmission distance between stations; each end of the line must have a line driver.

line feed

(LF). Feeding the paper through the printer just far enough to print the next line. Also, a button or computer instruction that activates a line feed.

line graphics

A way of representing pictures by designating coordinates and drawing lines or geometric shapes in relation to them. Line graphics are different from bitmapped graphics, in which an image is stored as a collection of pixels. In line graphics, the image is saved as a file containing instructions for drawing it.

line noise

Extraneous characters that appear in a computer transmission because of electrical noise in the communications link, which may be caused by a poor connection, electrical storms, or other problems.

line print terminal

(LPT). On a personal computer, the usual designation for a parallel port connection to a printer or other device such as a scanner or camera. LPT connections are numbered LPT1, LPT2, LPT3, etc.; most computers have at least one. More parallel ports can be added by installing parallel port adapter cards.

line printer

A printer that prints one line at a time. Dot matrix printers are line printers.

line probing

An ability of some modems to adjust their transmission rate according to the quality and capacity of the telephone line.

line spacing

A way of specifying vertical space between lines on a document by single spacing, double spacing, or one-and-a-half line spacing. Line spacing is not as fine-tuned a measurement as leading, but is good for letters, manuscripts, and many word processing uses.

line squeeze

A function in a mail merge operation that eliminates lines which have no data so there will not be a blank space on the label.

linear video

A video on tape that is viewed or edited in a linear sequence. CD-ROMs and LaserDiscs can display nonlinear video, in which the user can jump from frame to frame or clip to clip in any order.

linear video editing

The original process of editing analog videotape by inserting frames. Nonlinear video editing using digital processes is easier and becoming more common.

lines per inch

(lpi). A measurement of the resolution of a halftone screen, or of the number of lines a printer prints on a page in each vertical inch.

lines per minute

(lpm). A measurement of printer or scanner speed.

link

1. A connector; anything that connects two or more things. 2. A pointer in an HTML document that leads to another World Wide Web site, or to another place within the same document; also called a hyperlink. Linked text is usually underlined or shown in a different color from the surrounding text. Sometimes graphics are links or contain links. A link is activated by clicking on it. 3 A pointer embedded in a database record that refers to data or the location of data in another record. 4. A line or channel for transmitting data. 5. A call from a program to another program or subroutine. 6. To connect with a link.

link dead

A condition in which a network connection has failed.

linked list

A list in which each data element has information for locating the next. The data elements may be in noncontiguous storage locations.

linked list search

A search that uses a linked list.

linotype

An old keyboard-operated typesetting machine that produced each line of type as a solid metal slug. A bar of lead between lines of type provided the spacing, called leading.

Linotype

Trademark for the typesetting machine invented by Ottmar Mergenthaler in 1886, which quickly brought about a revolution in the printing industry.

LINPACK

A package of linear algebra software routines, and a benchmark developed from them.

Linux

An Open Source implementation of UNIX created by Linus Torvalds, which runs on many different hardware platforms including Intel, Sparc¨, PowerPC, and Alpha Processors. Hundreds of application programs have been written for Linux, some of these by the GNU project. Linux and Linux tools can be downloaded via the Internet or BBS for free, or purchased as part of a distribution on a CD-ROM.

LIPS

Logical Inferences Per Second. In artificial intelligence, the speed at which an application can process instructions. The human brain works at about 2 LIPS.

Liquid Crystal Display

(LCD). A type of display used on digital watches, calculators, and laptop computers. LCDs are lighter and consume much less power than other computer displays. Liquid crystals are rod-shaped molecules which spiral when they are exposed to an electrical charge. Polarized light passing through the layer of liquid crystal cells is twisted along the spiral path of the molecules. The light then passes through a series of filters which block light vibrating at certain angles and allow light vibrating at other angles to pass through; thus the color of each pixel can be controlled.

Lisa

The first personal computer on the market with a graphical user interface. Introduced in 1983 by Apple, the Lisa was the predecessor to the Macintosh.

Lisp

List Processor or List Processing. A programming language developed at MIT in the 1950s by John McCarthy. Lisp, based on lambda calculus, is widely used in artificial intelligence programs because it handles complex data structures more easily than other programming languages. Lisp is characterized by list processing, recursion, and character string manipulation. Lisp statements are linked lists; data objects may be lists or atoms.

list

1. An ordered set of data items. 2. To display a program line by line. 3. A command that causes the computer to display a list of items.

list administrator

The person who maintains a mailing list (an online discussion carried on by mailing copies of all correspondence to all the participants).

list box

A scrollable area within a dialog box where the user can choose from a list of items.

list processing

Processing data in the form of lists. List processing languages provide special commands to do this.

list processing language

A programming language which is used to process lists of data. Examples are LISP and Prolog.

Listproc

A UNIX automated mailing list server developed and owned by BITNET.

listserv

An automated email discussion list.

Listserv

An automated mailing list server first used on the BITNET/EARN network. Through Listserv, users can join or remove themselves from mailing lists, and make use of other services, by sending email messages. Listserv was originally designed to run on the IBM VM operating system.

lit fiber

Fiber-optic cable which is actively carrying a signal. When the cable is not carrying a signal, it is called dark fiber.

literal

In computer programming, a constant, or an instruction that remains unchanged; a literal is a value that is defined at compile time and cannot be modified by the programmer during run time.

literate programming

A programming method in which explanatory text accompanies the instructions in the computer programming language. The computer instructions may be marked to separate them from the text instructions, whereas in most programs it is the text comments that are marked.

lithium ion battery

The longest-lasting type of rechargeable battery used in portable computers. A lithium ion battery can go four or five hours without recharging.

lithium polymer technology

A technology which may provide more and longer-lasting power than lithium ion batteries for notebook computers.

little-endian

A binary data format in which the least significant bit would be on the left.

live chat

Online typed conversation in real time.

liveware

Living beings; people.

LLCC

Leadless Chip Carrier. A square chip package with flat contacts, instead of pin connectors, on each side. The leadless chip carrier is easier for the user to install than the leaded chip carrier. The user puts it into a specially designed socket and closes a clamp to establish its connections.

LMB

Left Mouse Button.

LMC

Left Mouse Click.

LMK

Let Me Know (chat).

ln

Natural (base e) logarithm.

load

1. To copy a program into memory so it can be run. 2. To put a disk or tape into a drive so it can be used. 3. To put data onto a disk so it can be used. 4. To make a font available for use on the computer.

loader

A computer program that loads another program into memory. All operating systems include loaders. When the user opens a program, the loader loads it and then transfers control to the program.

local

In communications, referring to equipment that is accessed directly without a telecommunications line.

Local Access and Transport Area

(LATA). A geographical area designated by the telephone company, usually having the same area code.

local area network

(LAN). A network that connects computers that are close to each other, usually in the same building, linked by a cable.

Local Area Wireless Network

(LAWN). A technology from O'Neill Communications, Inc., for wireless networking using a radio transmitter/receiver.

local bus

An extra bus in addition to the main bus in a computer, which provides a fast data path connecting the CPU with memory and peripherals. The local bus is designed to run at the speed of the CPU. The most common local busses are VLB (VESA Local Bus) and PCI (Peripheral Component Interconnect).

local bypass

A local telephone connection that does not have to be made through a telephone company.

local drive

A disk or tape drive that is connected to one's local computer, rather than on a network.

local memory

1. In a system that has more than one processor, the memory used by a specific processor that is not available to other processors. 2. Memory designated for use by a particular program or function.

local resource

A peripheral device that is directly connected to a local computer.

local storage

Disk storage used by one particular processor.

local system

The computer system the user is working on. The remote system is any other system in the network with which the local computer can communicate.

localization

Altering an operating system so the user interface is appropriate for the region or country in which it is used. Oftentimes this will necessitate the changing of sorting tables, terminology, times, measures, language and its colloquialisms. Contrast with internationalization.

LocalTalk

A local area network (LAN) protocol from Apple Computer. LocalTalk access is built into all Macintosh computers. LocalTalk uses twisted pair wire and a daisy chain topology, and transmits data at 235 Kbps.

lockup

A condition in which a computer cannot respond to user commands.

log

1. A record of a computer's or application's activity, used for system information, backup, and recovery. 2. Abbreviation for logarithm.

log file

A file that keeps track of a computer’s or application’s activity, for example, network connections.

log in

1. The act of accessing a computer system, usually by typing a username and password on a terminal. Contrast with log-in.

log off

To exit a network or remote system.

log on

To access a network or remote system. Logging on often requires a password.

log out

1. To disconnect from a network by typing logout, exit, quit, or a similar word. 2. To disconnect from a computer system.

log-in

The account name used to access a computer system. Contrast with log in

logarithm

The exponent showing the power to which a fixed number, the base, must be raised to produce a certain number. For example, 3 to the power of 2 = 9; the logarithm of 9, with 3 as the base, is 2.

logic board

The main circuit board inside a computer, which contains the central processing unit, the bus, memory sockets, expansion slots, and other components; also called the motherboard.

logic bomb

Code that is hidden in a program or system which will cause something to happen when the user performs a certain action or when certain conditions are met. A logic bomb, which can be downloaded along with a corrupted shareware or freeware program, may destroy data, violate system security, or erase the hard drive. It is not the same as a virus because the logic bomb executes once, or at periodic intervals, whereas the action of a virus is ongoing.

logic error

An error caused by a mistake in programming instructions. A logic error causes a program to operate wrongly or produce incorrect data, but not to stop working.

logical inferences per second

(LIPS). In artificial intelligence, the speed at which an application can process instructions. The human brain works at about 2 LIPS.

logical operator

One of the Boolean operators AND, OR and NOT.

logoff

The act of disconnecting from a network or remote system.

logon

The process of connecting to a network or remote system.

logout

1. The act of disconnecting from a network by typing logout, exit, quit, or a similar word. 2. The act of disconnecting from a computer system.

long card

A full-sized PC expansion card.

lossless compression

Compression methods in which no data is lost. With lossless compression, a large file can be compressed to take up less space, and then decompressed without any loss of information. In the case of graphics or video files, the quality of the original image will be preserved. An example of a lossless compression algorithm is gzip.

lossy compression

A compression technique in which a file can be highly compacted, but some data is lost. Large files such as graphics, video, or audio files can be stored in a smaller amount of space than with lossless compression, but some loss of quality will result when the file is decompressed. Examples of lossy compression algorithms are JPEG and MPEG.

Lotus 1-2-3

A widely-used spreadsheet program for DOS, Windows, Macintosh, Sun, VAX, OS/2, and UNIX, from Lotus Development Corporation.

Lotus Approach

This is a relational database created by the Lotus Development CorporationMacintosh.

Lotus Development Corporation

A software company that produced Lotus 1-2-3, Symphony, and Lotus Notes.

low frequency

(LF). Electromagnetic frequencies in the range of 30 to 300 kiloherz.

low resolution

A low number of dots or lines per inch. Low-resolution images use less memory but result in a lower print or display quality.

low-level language

A computer programming language that is close to machine language. Machine language is at the lowest level, because it is the actual binary code of 1s and 0s that the computer understands. Assembly languages are low-
level languages which are translated into machine code by an assembler. Each assembly language instruction corresponds to one machine language instruction, but assembly language is easier notation for the programmer to use than machine code.

low-radiation monitor

A computer monitor that is designed to minimize the radiation it emits. VLF (very low frequency) and ELF (extremely low frequency) radiation from computer screens are a health concern, but their effects are not known.

lower case

The non-capitalized letters on the keyboard.

lower letter row

The lower letter row (row of letter keys) on a keyboard.

lowercase

Not capitalized; referring to letters on the keyboard.

LPF

League for Programming Freedom. A nonprofit organization dedicated to “bringing back the freedom of programmers to write programs,” in the face of the recent trend toward complicated copyright and patent lawsuits. Address: 1 Kendall Square #143, P.O.Box 9171, Cambridge, Massachusetts 02139 U.S.A. (http://www.lpf.org/).

lpi

Lines Per Inch. A measurement of the resolution of a halftone screen, or of the number of lines a printer prints on a page in each vertical inch.

lpm

Lines Per Minute. A measurement of printer or scanner speed.

lpr

A UNIX command to print a file.

LPT

Line Print Terminal. On a personal computer, the usual designation for a parallel port connection to a printer or other device such as a scanner or camera. LPT connections are numbered LPT1, LPT2, LPT3, etc.; most computers have at least one. More parallel ports can be added by installing parallel port adapter cards.

LQ

Letter Quality. Printing quality as good as, or better than, the best typewriters. Laser printers produce letter quality printing, and some inkjet and dot-matrix printers do also.

ls

A UNIX command to list the contents of a directory.

LSB

Least Significant Bit. The bit of a binary number which is farthest to the right, indicating the number of ones; also designated as bit zero.

LSI

Large-Scale Integration. The use of integrated circuits with more than 100 logic gates. Fourth-generation computers have large-scale integration.

LT

Less than: < .

LUG

Linux User Group.

Lukasiewicz notation

The same as Polish notation, which is a way of expressing a sequence of calculations without using parentheses to show which operation must be performed first. For example, the expression 2(4+5), which instructs the reader to add 4 + 5 and multiply by 2, would be written * 2 + 4 5 in Polish notation. To make the calculation, read from right to left until you find an operation, then perform the operation on the numbers immediately to the right of it, and continue to the next operation. So * 2 + 4 5 becomes * 2 9 and then 18. Reverse Polish notation is worked from left to right. Polish notation was invented by Jan Lukasiewicz, a Polish logician.

Lukasiewicz, Jan

A Polish logician (1878-1956), the inventor of Polish notation.

lumen

A unit of measurement of the rate at which light is emitted from a source. The International System unit of luminous flux, equal to the light emitted in a unit solid angle by a uniform point source of one candela.

luminance

Brightness; the amount of light, in lumens, that is emitted by a pixel or an area of the computer screen.

lurk

To visit an online discussion and read other people's postings without contributing any comments of one’s own. Lurking is a good way for a beginner to get familiar with a newsgroup or forum.

lurker

A visitor to an online discussion who reads other people's postings but does not contribute. Lurking is a good way for a beginner to get familiar with a newsgroup or forum.

lurking

Visiting an online discussion and reading other people's comments without contributing. Lurking is a good way for a beginner to get familiar with a newsgroup or forum.

LVD

low voltage differential.

Lview Pro

A Windows utility for viewing GIF, TIFF, and JPEG files.

Lycos

An Internet search engine (http://www.lycos.com/) created at Carnegie Mellon University.

Lynx

A freely distributed text-based World Wide Web browser originally developed at the University of Kansas. Lynx cannot display images, but is widely used in non-graphical systems in universities, libraries, and freenets, and by others who want to bring the World Wide Web to as wide an audience as possible. HTML pages with graphics will often provide alternative information for text-based browsers. The most recent, and probably final, release of Lynx distributed by the University of Kansas is 2.4.2. Lynx 2.7 is maintained by Foteos Macrides at the Worcester Foundation for Biological Research. Lynx runs on UNIX and VMS systems, and can run on DOS, Windows, and Macintosh with VT100 terminal emulation. The name is a pun on “links”.

LZ77

A compression technique developed by Jacob Ziv and Abraham Lempel, later used with LZ78 to create the LZW compression algorithm. LZ77 works by scanning through a fixed length block of data and eliminating repeating data by substituting a pointer back to the original data.

LZ78

A compression technique developed by Jacob Ziv and Abraham Lempel, later used with LZ77 to create the LZW compression algorithm. LZ78 works by scanning through a block of data and creating a dictionary of repeating phrases; instead of repeating a section of data, a pointer that indicates the original data is substituted.

lzexe

A DOS executable file compression program. It decompresses when it is executed.

LZW compression

Lempel-Ziv Welch compression. A compression algorithm designed by Terry Welch based on the LZ77 and LZ78 compression techniques developed by Jacob Ziv and Abraham Lempel. LZW compression is used for both archiving and transmitting files.

Submit a name

6 Comments on Dictionary

  1. I honestly believe that Adrian Peterson, Arian Foster, Ray Rice, Marshawn Lynch, or Jamaal Charles
    should be your focus in the first round. The different types of
    defensive football positions are:. I guess
    a handful of suspensions was enough to satisfy the
    NCAA.

  2. Their goal was to establish a statewide coalition between the insurance industry, law enforcement officials and other criminal justice agencies to implement vehicle theft reduction strategies.
    Pickup trucks and sport utility vehicles are heavily targeted because they are easy to crawl under.
    Dealers must provide consumers with any other advertised rebates or discounts
    in addition to the credit they receive through the CARS Program.

  3. Terrific article! This iis the kind of info that should be shared
    across the net. Shame on Google forr noot positioning thhis put up
    higher! Come on over and consult with my web site
    . Thanks =)

  4. Great blog here! Also your website loads up fast! What web host are
    you using? Can I get your affiliate link to your host?
    I wish my web site loaded up as quickly as
    yours lol

  5. Hey There. I found your weblog the use of msn. This is
    an extremely smartly written article. I’ll make sure to bookmark it
    and return to read more of your useful information. Thank you for
    the post. I’ll certainly return.

  6. Hi there, after reading this awesome piece of writing i am
    as well happy to share my know-how here with mates.

Leave a comment