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There are 60 names in this directory beginning with the letter Q.
Q

1. A very high level language, implemented in C++. 2. Quadrature.

QA

Quality Assurance. Procedures taken to ensure that a company delivers products that conform to standards.

QAM

Quadrature Amplitude Modulation. A technique of modulation in which there are sixteen possible four-bit patterns, determined by the combination of phase and amplitude.

QBASIC

The version of QuickBASIC that comes with DOS 5 and later versions. It replaces, and accepts programs written for, Microsoft's GW-BASIC.

QBE

Query By Example. A user-friendly way of querying a database that was originally developed by IBM for use with mainframes, and later adopted by many other systems. With Query By Example, an empty record is displayed and the user types in the search keys; for example, typing “New York” in the “city” field will return all records where the city is New York.

Qbench

A DOS hard disk benchmark from Quantum Corporation, which measures data access time and data transfer rate.

QDOS

1. Quick And Dirty Operating System. An early personal computer operating system rumored to be the forerunner of PC-DOS and MS-DOS. 2. An operating system designed for the Sinclair QL computer.

QEMM

Quarterdeck Expanded Memory Manager. A DOS and Windows memory manager from Quarterdeck Office Systems, Santa Monica, California; used for IBM PCs with an Intel 80386 or higher processor.

QIC drive

(Quarter Inch Cartridge drive). A drive used to back up personal computer data on quarter inch cartridges.

QIC tape

Quarter Inch Cartridge tape. A magnetic tape used for backing up data, which comes in hard cartridges. QIC tape comes in minicartridges (3.5″) and data cartridges (5.25″). There are various types of cartridges and lengths of tape, storing from 40 megabytes to 25 gigabytes of data.

QIC Wide

Quarter Inch Cartridge Wide. A quarter inch cartridge tape from Sony that is wider than 1/4 inch. It is .315″ wide and has a greater recording density, thus increasing the storage capacity.

QIC-EX

Quarter Inch Cartridge – Extended. These magnetic tape cartridges come in both .25″ and .315″ formats and contain longer tape to extend the storage capacity of the quarter inch tape drives.

QL

(Quantum Leap). A personal computer developed by Sir Clive Sinclair and first released in 1983. It is based on the Motorola 68008 microprocessor and uses an operating system called QDOS developed by Sinclair.

QMS

Quality Micro Systems. A Mobile, Alabama manufacturer of laser printers. QMS made one of the first PostScript printers.

QTW

QuickTime for Windows. Multimedia software from Apple Computer that integrates full-motion video and sound into application programs.

quad

Two bits (a quarter of a byte).

quad-speed CD-ROM drive

(4X) A CD-ROM drive that can read information four times as fast as a music CD. At least a double speed drive is needed for multimedia CD-ROMs, and quad speed is even better.

quad-speed drive

A CD-ROM drive that is four times as fast as a single-speed drive. Quad-speed drives substantially improve the quality of multimedia.

Quadra

A brand name for one of the Macintosh series of computers.

quadrature

(Q). At 90 degrees to a reference.

quadrature amplitude modulation

(QAM). A technique of modulation in which there are sixteen possible four-bit patterns, determined by the combination of phase and amplitude.

quadrillion

One thousand trillion or 10^15 (U.S. and Canada); 10^24 (Europe).

Quake

A 3D simulation game published and developed by id Software. The game is similar to DOOM or Hexen, with monsters to fight, armor, and weapons such as axes, nailguns, and shotguns. The game is built to be used with the Pentium processor and has 32-bit action. The graphics in Quake are detailed and realistic, and range from low resolution VGA to high resolution SVGA. The creatures in Quake are fairly intelligent. There are also realistic sound effects, and a musical score. A limited version of Quake can be downloaded as shareware.

Qualcomm

The California company that developed Eudora, a popular email program for Macintosh and PC, and Omnitracs, a tractor-trailer tracking system.

qualified name

A name given to something which includes the class to which it belongs in a classification system.

quality assurance

(QA). Procedures taken to ensure that a company delivers products that conform to standards.

quantifier

One that quantifies; in mathematics or logic, a prefixed operator which states for which values of a variable a formula is true.

quantum computing

Applying the principles of quantum mechanics to computer technology. If the concept of quantum computing can be made practical, it will make computers of the future much faster than those of today.

Quantum Leap

(QL). A personal computer developed by Sir Clive Sinclair and first released in 1983. It is based on the Motorola 68008 microprocessor and uses an operating system called QDOS developed by Sinclair.

QuarkXpress

A page layout program from Quark, Inc., for Macintosh and Windows.

Quarter Inch Cartridge – Extended

(QIC-EX). These magnetic tape cartridges come in both .25″ and .315″ formats and contain longer tape to extend the storage capacity of the quarter inch tape drives.

quarter inch cartridge drive

(QIC drive). A drive used to back up personal computer data on quarter inch cartridges.

quarter inch cartridge tape

(QIC tape). A magnetic tape used for backing up data, which comes in hard cartridges. QIC tape comes in minicartridges (3.5″) and data cartridges (5.25″). There are various types of cartridges and lengths of tape, storing from 40 megabytes to 25 gigabytes of data.

quarter inch cartridge wide

(QIC Wide). A quarter inch cartridge tape from Sony that is wider than 1/4 inch. It is .315″ wide and has a greater recording density, thus increasing the storage capacity.

Quarterdeck Expanded Memory Manager

(QEMM). A DOS and Windows memory manager from Quarterdeck Office Systems, Santa Monica, California; used for IBM PCs with an Intel 80386 or higher processor.

quartz crystal

The material used to maintain the heartbeat of a computer. A thin slice of quartz, activated by electrical pulses, vibrates at a steady frequency.

quattuordecillion

10^45 (U.S. and Canada); 10^84 (Europe).

query

To request information from a database.

Query By Example

(QBE). A user-friendly way of querying a database that was originally developed by IBM for use with mainframes, and later adopted by many other systems. With Query By Example, an empty record is displayed and the user types in the search keys; for example, typing “New York” in the “city” field will return all records where the city is New York.

query language

A language used for querying a database or other type of file.

ques

ASCII character 63: ? , question mark.

Questel Orbit, Inc.

An online service offering medical, patent, and trademark databases, based in McClean, Virginia.

question mark

ASCII character 63: ? .

queue

A first-in first-out data structure used for lining up requests for a resource such as a printer or communications channel.

quick and dirty

Thrown together fast and therefore not with the greatest attention to detail.

Quick Time

See QuickTime.

QuickBASIC

A fast compiler of BASIC under MS-DOS; later known as MS-BASIC. Developed by Microsoft, it adds some advanced features to BASIC. A version of QuickBASIC called QBASIC, which does not produce standalone executables, is provided with later versions of MS-DOS.

QuickBooks

A Windows and Macintosh small business accounting program from Intuit, Inc., Menlo Park, California.

QuickC

Microsoft's quick-and-easy C compiler and development software.

QuickDraw

Graphics software built into the Macintosh ROM, which draws images on the screen in response to commands from applications.

Quicken

A financial management program from Intuit, Inc., Menlo Park, California, for personal and small business use. It is available for PC and Macintosh.

QuickTime

A System 7 extension for Macintosh from Apple Computer that integrates full-motion video and sound into application programs. Also available as QuickTime for Windows (QTW).

QuickTime for Windows

(QTW ). Multimedia software from Apple Computer that integrates full-motion video and sound into application programs.

QuickTime VR

QuickTime Virtual Reality. A multimedia program that allows 3-D viewing of objects on screen.

quindecillion

10^48 (U.S. and Canada); 10^90 (Europe).

quintillion

10^18 (U.S. and Canada), 10^30 (Europe).

quit

To exit a program.

quotient

The number that results from dividing the numerator of a fraction by its denominator.

quux

An indefinite noun like foo.

QWERTY keyboard

The standard typewriter or computer keyboard. The arrangement of letters originally was designed to keep fast typists from jamming the old mechanical typewriters; frequently-used keys are separated from each other. With modern keyboards there are no longer jamming problems. An alternative keyboard called the Dvorak layout was designed which has the most frequently-used keys all on the center line for faster typing, but the qwerty keyboard continues to be used because so many typists know it.

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