What is the difference between PCMCIA and ExpressCard?

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ExpressCard is the hardware standard replacing PMCIA type II cards. ExpressCards are considered better than PCMCIA cards because they are faster.  ExpressCards communicate with a higher bandwidth and consumes less power than a PCMCIA or Cardbus.

New laptops do not include PCMCIA ports but do include ExpressCard ports. There are two Express Card formats – 54 and 34....

What is CardBus?

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CardBus is the latest enhancement to the PCMCIA 5.0 or later. PMCIA stands for Asociación Internacional de Tarjetas de Memoria. CardBus was introduced in 1995 and present in laptops from late 1997 onward. The main purpose of CardBus was to extend the existing PCMCIA bus to allow more powerful devices, and also provide support for 32 Bit I/O. CardBus includes bus mastering, which allows a controller on the bus to talk to other devices or memory without going through the CPU. CardBus also has the ability to operate at speeds up to 33MHz....