Java: A network-oriented programming language invented by Sun Microsystems specifically designed for creating programs that can be downloaded to your computer from a web page and immediately run. Using small Java programs ("applets"), Web pages can include features such as animations, calculators and other fancy or interactive tricks.

JDK: (Java Development Kit) - A software development package from Sun Microsystems containing the basic tools needed to write, test, and debug Java applications and applets.

JPG: (Joint Photographic Experts Group) - The name of the committee that designed the photographic image-compression standard. The format (.jpg) is optimized for compressing full-color or grayscale photographic images, and does not work well for line drawings or black-and-white images. JPG images are 24-bit (16.7 million color) graphics.