J
Java
A programming language designed for program execution on the client side, i.e., in a browser. It is best for creating applets and applications for the Internet, intranets and any other complex distributed network.
JavaScript
A proprietary scripting language by Netscape that adds author-specified user events to static pages.
JPEG, JPG
Joint Photographic Experts Group, ISO/CCITT standard for compressing still images (grayscale or color). Image files.