Computer Terminology - J

This web page looks at some of the terminology associated with the Computer Industry. This appendix is not to be deemed as complete but does cover a large range of common terminology.

If you find a term not covered in this file you may Email Button and list the word (computer connected terminology ONLY). We will endeavour to locate the meaning and respond to you. If we consider it a common enough term, we will add it to our list. New terminology (with explanation) may also be submitted for consideration.

Index SIZE Numeric 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

jack in: To log in to a machine or connect to a network. Derived from cyberpunk fiction.

Java: An object oriented programming language created by Sun Microsystems. Java is a device independent language, meaning that programs compiled in Java can be run on any computer. Java programs can be run as a free-standing application or as an applet placed on a web page. Applets written in Java are served from a web site but executed on the client computer. Java applets have a built-in security feature which prevents them from accessing the file system of the client computer. See also applet.

JavaScript: A scripting language that allows lines of Java code to be inserted into HTML scripts.

JPEG/JPG: Joint Photographic Experts Group. This is a major graphic file format and allows for the graphic to be compressed for faster transfer. Graphic files using this format can be compressed to as small as 5% of their original size. It is the best format for saving photographs because of its high colour recognition and compact sizing.

Jumper: An electrically-conductive part that is used to connect two or more points on a circuit board. Commonly used to select among options or turn an option on or off.

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