J

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Java

A programming language developed by SUN. Mostly for programming web servers and web applets.

JavaScript

The most popular scripting language on the internet, developed by Netscape.

Joystick

In computers, a joystick is a cursor control device used in computer games and assistive technology.

JPEG

Joint Photographic Experts Group
A digital image file format designed for maximal image compression. JPEG uses "lossy" compression in such a way that, when the image is decompressed, the human eye won't find the loss too obvious. The amount of compression is variable and the extent to which an image may be compressed without too much degradation depends partly on the image and partly on its use.

JScript

Microsoft's version of JavaScript.

JSP

Java Server Pages
A Java based technology allowing the insertion of server executable scripts in web pages. Mostly used on Linux, Unix and Solaris platforms.

Jumper

A small, removable plastic cap on connector pins that acts as a switch: On is indicated when the jumper covers both pins; Off is indicated when the jumper covers only one of the pins (or is completely removed).