Compaq Armada 7400 Reference Manual page 109

There are three PC Card types set by the PCMCIA
standards association: Type 1 (3.3 mm), Type 2
(5.0 mm), and Type 3 (10.5 mm).
Type II and Type III PC Cards also come in extended PC
Cards. The computer supports up to two PC Cards
simultaneously: either one Type III card with one Type I
or Type II card, or two Type l and Type II cards, in any
combination. The computer supports several kinds of
PC Cards, such as network cards, hard drive cards,
memory cards, and fax/modem cards.