Java.
Java is a portable object-oriented language developed by Sun Microsystems that is used mostly for Web programming, although it is a full featured language that can be used to develop large applications. Java programs come in two types: applications and applets. Basically, applications are stand-alone programs; applets are what you see when you encounter Java on the Web. Applets have much tighter security restrictions than do applications.
JavaScript.
JavaScript is an object-oriented scripting language developed by Netscape Communications for client/server applications. Web authors use JavaScript to spice up their sites with dynamic content. JavaScript is endorsed by a number of software companies and is an open language that anyone can use without purchasing a license. When a remote site sends a document containing JavaScript statements, your browser executes these statements.
JPEG. Acronym for Joint Photographic Experts Group.
A standard compression algorithm used for minimizing the amount of data required to display graphic files, particularly those used on the Internet. It was named for a group that devised the standard