Short for Personal Computer Memory Card International Association, and pronounced as separate letters, PCMCIA is an organization consisting of some 500 companies that has developed a standard for small, credit card-sized devices, called PC Cards. Originally designed for adding memory to portable computers, the PCMCIA standard has been expanded several times and is now suitable for many types of devices. There are in fact three types of PCMCIA cards. All three have the same rectangular size (85.6 by 54 millimeters), but different widths
Type I cards can be up to 3.3 mm thick, and are used primarily for adding additional ROM or RAM to a computer.
Type II cards can be up to 5.5 mm thick. These cards are often used for modem and fax modem cards.
Type III cards can be up to 10.5 mm thick, which is sufficiently large for portable disk drives.
As with the cards, PCMCIA slots also come in three sizes:
A Type I slot can hold one Type I card
A Type II slot can hold one Type II card or one Type I card
A Type III slot can hold one Type III card or any combination of two Type I or II cards.
In general, you can exchange PC Cards on the fly, without rebooting your computer. For example, you can slip in a fax modem card when you want to send a faxand then, when you’re done, replace the fax modem card with a memory card.
Short for personal communications service, the U.S. Federal Communications Commission (FCC) term used to describe a set of digital cellular technologies being deployed in the U.S. Also referred to as digital cellular, PCS works over CDMA (also called IS-95), GSM, and North American TDMA (also called IS-136) air interfaces. Three of the most important distinguishing […]
Originally developed by ZSOFT for its PC Paintbrush program, PCX is a graphics file format for graphics programs running on PCs. It is supported by most optical scanners, fax programs, and desktop publishing systems. Files in the PCX format end with a “.pcx” ( pronounced dot -p-c-x) extension. Two other common bit map formats are […]
The name IBM uses to market its version of the DOS operating system.
- PC card
A computer device packaged in a small card about the size of a credit card and conforming to the PCMCIA standard.
A combination of a personal computer and television. PC/TVs are computers with built-in television boards.