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J CKInfo Items

Computer Knowledge information pages for terms starting with the letter J.

JBIG - Joint Bi-level Image Experts Group

(jay-big) A group of experts dedicated to produce standards for bi-level image coding. The file format is a lossless compressed format that is robust; handling even progressive images (multiple resolutions in a single image). Some of the functiona...

JCL - Job Control Language

(J-C-L) Often used in larger computer systems, JCL is any control language that controls the execution of applications. The syntax is usually quite strict; you dare not add even an extra space where it is not expected. (I remember coding JCL instr...

JDBC - Java Database Connectivity

(J-D-B-C) A Java API, developed by JavaSoft, part of Sun Microsystems. The API provides an interface between SQL-compliant databases and the Java language. Similar to ODBC, JDBC is written specifically for Java (ODBC is independent of any specific...

JDK - Java Developers (Development) Kit

(J-D-K) As the name implies, there are kits that assist in the production of Java applets. These are typically a combination editor and compiler. More Information Sun Java Site

JEIDA - Japan Electronic Industry Development Association

(J-E-I-D-A) An Association established in 1958 as a non-profit organization interested in contributing to Japan's economic prosperity by stimulating development in the electronics industry. More Information JEIDA Home Page

JFIF - JPEG File Interchange Format

(J-F-I-F) A minimal file format that simplifies the more robust JPEG format in order to enhance exchange of bitstreams between a wide variety of platforms and applications. The file is still basically a JPEG file. More Information JFIF Format JPEG...

Joe Job - Use of a fake return address in a spam message

A Joe job is the use of a fake return address in a spam message to make the message look like it's coming from a domain or sender other than the spammer. A Joe job can be an intentional thing where the actual sender is attempting to make the owner...

JOVIAL - Jules' Own Version of the International Algebraic Language

(jovial) A programming language of the 1960s-70s developed by Jules Schwartz (the language was developed in 1959-60). JOVIAL was similar to ALGOL. JOVIAL was widely used by the U.S. Air Force. More Information JOVIAL History Official USAF JOVIAL S...

JPEG - Joint Photographic Experts Group

(jay-peg) An image compression specification named for the group that created it. While extensive compression is available, the JPEG specification is lossy (data is lost during the compression process). Therefore one should not recompress JPEG com...

Jump Line - A continuation link for split articles

The small line of text at the bottom of the first part of a continued article which indicates where the article continues. Word processing and page layout programs usually have built-in features which allow you to insert a variable into the jump l...

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