All Card N. A PC/AT-size Expansion Card (these Can Be Larger Than IBM PC Or XT Cards Because The AT Case Is Bigger).

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tall card n.

A PC/AT-size expansion card (these can be
larger than IBM PC or XT cards because the AT case is bigger). See
also short card. When IBM introduced the PS/2 model 30 (its
last gasp at supporting the ISA) they made the case lower and many
industry-standard tall cards wouldn't fit; this was felt to be a
reincarnation of the connector conspiracy, done with less
style.

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