An expansion card for the ibm pc at. These can be larger than ibm pc or ibm pc xt cards because the AT case is bigger.

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.

See also short card.

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