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
-- The AI Hackers Dictionary