PC card - Computer Definition
More correctly, PCMCIA card. An add-in integrated circuit card that conforms to specifications developed and promoted by the Personal Computer Memory Card International Association (PCMCIA). PC cards are approximately the length (86.5 mm) and width (54 mm) of a credit card, but Switch CPU Power Supply Central Office Switch Line Interfaces PBX MDF Host Interface AP demarc Data Network PBX Tie Trunk CO Trunk much thicker, and fit into a slot built into a laptop or tablet personal computer (PC) or peripheral.Type I cards are 3.3 mm thick and are used for add-in random access memory (RAM).Type II cards are 5.0 mm thick and are commonly used for add-on modems, fax modems, and Ethernet network interface cards (NICs).Type III cards are 10.5 mm thick and are used for supplemental rotating hard disk drives. See also fax, modem, NIC, PC, PCMCIA, and RAM.
An expansion interface developed by the Personal Computer Memory Card International Association (PCMCIA) that was popular on laptops in the 1990s and early 2000s. Also known as "PCMCIA cards," PC Cards are plug-in modules that contain devices such as a modem, network adapter, sound card, solid state drive or hard disk. Routinely plugged into older laptops to add missing functionality, PC Cards were superseded by ExpressCards. See PCMCIA. PC Card and CardBus In 1990, the PC Card was introduced with a 68-pin connector and 86x54 mm form factor. Five years later, the CardBus increased the data path from 16 to 32 bits and data rate from 40 to 132 Mbytes/sec. CardBus added support for different voltages, bus mastering and power management. Earlier laptops had one or more Type II slots (see below), but most new laptops no longer support them. They may, however, have an ExpressCard slot. ExpressCard In 2003, the third-generation ExpressCard was introduced in two smaller sizes and uses USB and PCI Express interfaces. The data rate was increased to 342 Mbytes/sec. See ExpressCard, CableCARD and PC Card adapter. PC Card ----Form Factor--- CardBus Thick Long Wide Type (in millimeters) I 3.3 86 54 II 5.0 86 54 III 10.5 86 54 ExpressCard 34 5 75 34 54 5 75 54