Quatech MPAP-100 - Manual (Page 25)

If PCMCIA support was not selected when OS/2 was installed, add it by using the
Selective Install facility in the System Setup folder. Full PCMCIA support is built into OS/2
Warp 3.0 and later. On OS/2 2.1 and 2.11, PCMCIA Card Services is built in, but you must add
Socket Services separately.