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ExpressCardThe third-generation expansion interface from the USB Implementers Forum (www.usb.org). Introduced in 2003 by the Personal Computer Memory Card International Association (PCMCIA), the ExpressCard was a plug-in module that superseded the PC Card standard for adding functionality to laptops. ExpressCard boosted the data rate from 132 to 342 Mbytes/sec. It supported USB 2.0 and single lane PCI Express simultaneously (see USB and PCI Express).
Smaller than PC Cards
ExpressCards were 11mm shorter than PC Cards and came in two widths: 54mm and 34mm. ExpressCard 54mm slots accommodated both sizes.
An Almost-Internal USB Solution
The ExpressCard eliminated the need to carry an external USB storage device and cable. For example, a hard drive or flash drive could remain within the laptop when traveling, with only a small protrusion jutting out from the side. See PC Card.
|The two leftmost ExpressCards are 54mm modules, while the other four are 34mm modules. (Image courtesy of Personal Computer Memory Card International Association.)|
|Two ExpressCard Sizes|
|The same 5mm thickness as Type II PC Cards, but 11mm shorter, ExpressCards came in two widths (see PC Card). (Image courtesy of Personal Computer Memory Card International Association.)|
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