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

Also known as Visual J++, this is a Windows-based Java development system that's used to create Java applications that can run on any platform.

J2EE

Java 2 Platform, Enterprise Edition: a platform from Sun for building distributed enterprise applications by performing services in the middle tier between the user's machine and the enterprise's databases and legacy systems.

jack

A connector into which a plug is inserted.

jack in

To enter a virtual reality simulation by means of a computer. A term which comes from cyberpunk science fiction and originally referred to plugging in electrodes to interface the brain directly with a virtual reality.

jack out

To leave a virtual reality simulation; the opposite of jack in.

jacket

The plastic covering that protects a floppy disk.

JAD

Joint application development is a RAD (Rapid Application Development) concept, which involves cooperation between the designer of a computer system and the end user to develop a system that exactly meets the user's needs.

Jade

A freely-available DSSSL engine developed by James Clark. It is a fast C++ based processor that is available for Win32 and UNIX platforms.

jaggies

The jagged edges that appear in graphics on diagonal or curved lines. The stair-step appearance is the result of trying to build a diagonal or curved line out of little squares. One solution is to create the image in a large format and reduce it to the desired size, so the pixels are smaller in relation to the image. Another solution is anti-aliasing, which means putting pixels along the jagged edge which are of an intermediate color between the background and the image. This makes the line look smoother.

JANET

Joint Academic Network. A university network in the United Kingdom, renamed “Super-JANET” after it upgraded to higher speed links.

Japanese Electronic Industry Development

(JEIDA). A Japanese standards organization.

jargon

The specialized or technical language of a trade; for example, computerese.

Jargon File, The

The Jargon File. A large online collection with definitions of hacker and computing terms (http://beast.cc.emory.edu/Jargon30/JARGON.HTML).

Java

A cross-platform programming language from Sun Microsystems that can be used to create animations and interactive features on World Wide Web pages. Java programs are embedded into HTML documents. HotJava and Netscape Navigator (2.0 or above) are Web browsers that run Java applications.

Java 2

A version of the programming language Java. The files are formated in byte code, and the language runs on most computers. Java is very important for exploring the World Wide Web. See also Java.

Java applet

A little application written in Java language which can be embedded in an HTML document. On the World Wide Web, Java applets can be executed by Netscape Navigator or Sun's HotJava browser.

Java Development Kit

(JDK). A software development kit from JavaSoft, for producing Java programs.

Java Virtual Machine

(JVM). A virtual machine is a simulated computer; it runs on a host computer but behaves as if it is a separate computer. The Java Virtual Machine works as a self-contained operating environment to run Java applets, with the advantage that Java applets can be run independently from the host operating system.

JavaScript

A cross-platform WWW scripting language from Netscape Communications, very popular because it is simple and easy to learn. It can be included in an HTML file by using the tag <script language="JavaScript">.

JavaSoft

The division of Sun Microsystems that works with Java technology.

Jaz drive

A compact, removable-cartridge disk drive made by Iomega Corporation. A 540MB and a 1GB cartridge are available.

JBIG

Joint Bi-level Image Experts Group. A group formed by ISO, IEC, and ITU-T for creating a lossless compression standard for images. JBIG compression is highly efficient and gives high-quality images with no loss of data from compression and decompression. It can be used with text, line art, and halftones.

JCL

Job Control Language. A command language for mainframes and minicomputers, used for launching applications.

JDK

Java Development Kit. A software development kit from JavaSoft, for producing Java programs.

JEDEC

Joint Electronic Device Engineering Council. An international organization that sets standards for integrated circuits.

JEIDA

Japanese Electronic Industry Development Association. A Japanese standards organization.

JetForm

Forms software from JetForm Corporation for DOS, Windows and Macintosh.

jewel box

A plastic container for a CD or CD-ROM disc. Also called jewel case.

JFIF

JPEG File Interchange Format.

JIPS

JANET (Joint Academic Network) Internet Protocol Service. See JANET and SuperJanet.

Jmark

A benchmark suite including eleven synthetic Java performance tests.

job

In computer terminology, a project done on a computer.

Job Control Language

(JCL). A command language for mainframes and minicomputers, used for launching applications.

job queue

The lineup of jobs to be run.

job scheduling

Setting up a job queue and scheduling when jobs will be run. This term is most often used with large computers, but can also apply in a shop with small computers.

Jobs, Stephen

Cofounder of Apple Computer in 1975, with Steve Wozniak. Apple released the Macintosh computer in 1984, which was a milestone in the personal computer revolution. In 1985 Jobs started NeXT Inc., a company that builds workstations.

Joe

A computer account whose password is the user's name. Joe accounts are easy for crackers to break into because the passwords are easy to guess.

Joint Academic Network

(JANET). A university network in the United Kingdom, renamed “Super-JANET” after it upgraded to higher speed links.

joint application development

(JAD). is a RAD (Rapid Application Development) concept, which involves cooperation between the designer of a computer system and the end user to develop a system that exactly meets the user's needs.

Joint Bi-level Image Experts Group

(JBIG). A group formed by ISO, IEC, and ITU-T for creating a lossless compression standard for images. JBIG compression is highly efficient and gives high-quality images with no loss of data from compression and decompression. It can be used with text, line art, and halftones.

Joint Electronic Device Engineering Coun

(JEDEC). An international organization that sets standards for integrated circuits.

Joint Photographic Experts Group

(JPEG.) A format for storing high-quality color and grayscale photographs in bitmap form; also the group that developed the format. JPEG provides lossy compression by segmenting the picture into small blocks which are divided to get the desired ratio; the process is reversed to decompress the image. JPEG uses the JPEG File Interchange Format, or JFIF.

Joint Technical Committee

JTC1, created by ISO and IEC. It is comprised of standards organizations from over 75 countries, and is involved with setting standards for information processing.

joule

A unit of work or energy equal to 10,000,000 ergs, or the work done by a force of one newton acting through a distance of one meter. Named for James Joule, English physicist.

journal

A daily, or regular, record of events and transactions.

journaling

Keeping a journal. A journal for a computer includes a record of changes made in files, messages transmitted, etc. It can be used to recover previous versions of a file before updates were made, or to reconstruct the updates if an updated file gets damaged.

journalled file system

A file system in which updates are automatically recorded in a journal, so if the new file is lost it can be recreated.

joystick

A hand held stick like the joystick in an airplane, which is used as a pointing device in arcade games and video games. The joystick can move an object on screen in any direction. It usually has one or more push buttons for shooting, jumping, etc. Joysticks are also used in some CAD systems.

JPEG

Joint Photographic Experts Group. A format for storing high-quality color and grayscale photographs in bitmap form; also the group that developed the format. JPEG provides lossy compression by segmenting the picture into small blocks which are divided to get the desired ratio; the process is reversed to decompress the image. JPEG uses the JPEG File Interchange Format, or JFIF.

JPEG++

An extension to JPEG from Storm Technology that allows different areas of a picture to be compressed at different ratios.

JPEGView

A Mac utility for viewing JPEG and TIFF files.

JSA

Japanese Standards Association.

JTC1

Joint Technical Committee for information technology, created by ISO and IEC. It is comprised of standards organizations from over 75 countries, and is involved with setting standards for information processing.

Jughead

Jonzy's Universal Gopher Hierarchy Excavation And Display. Jughead is a tool which can be used to search for a key word on all levels of a Gopher menu.

jukebox

A machine that holds and plays CDs, vinyl records, videodisks, tape cartridges, or CD-ROMs. The jukebox automatically picks up disk or tape the user has selected, and moves it to the drive to be played.

Julian date

A way of writing a date which shows the year in positions 1 and 2, and the day in positions 3-5. The day is a number from 1 through 366, with zeros in the unused positions. So January 12, 1997 would be 97012.

JUNET

Japan UNIX Network.

justification

Alignment of text on both left and right margins, except for last lines of paragraphs, which are flush left, and paragraph indents if used.

justified

Aligned on the left and right margins, with the last lines of paragraphs flush left. Justified text may have paragraph indents.

JVM

Java Virtual Machine. A virtual machine is a simulated computer; it runs on a host computer but behaves as if it is a separate computer. The Java Virtual Machine works as a self-contained operating environment to run Java applets, with the advantage that Java applets can be run independently from the host operating system.

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