Compaq 277958-001 manual Hinged plastic case in which CDs are often stored

Understanding Computer Terms

ISP (Internet Service Provider)

A company that provides access to the Internet. To use the service, you need the ISP software, a user name, a password, and access phone number(s).

J

jewel case

The hinged plastic case in which CDs are often stored.

jewel case sleeve

The pieces of paper that can be inserted into the jewel case to help identify the contents of the CD stored in the case.

joystick

A lever that moves in all directions to control the movement of a pointer or objects on the screen. It is used for computer games in which you drive, fly, or shoot objects displayed on the monitor.

JPEG

(pronounced “jaypeg”). A file format for graphics, especially photographs, displayed on the Internet. It is easily identified by the file extension .jpg. JPEG files, which store more information per pixel than GIF files, are used for complex, high-resolution images. See GIF. See also pixel.

L

lead-in

An area at the beginning of each session on a recordable session that is left blank for the session’s table of contents. The lead-in is written when a session is closed, and takes up 4500 sectors, approximately one minute, on a CD. The lead-in also contains the next writable address on the CD so that future sessions can be added, unless the CD is closed.

5–16 Learning More About Your Computer