and Professional Graphics Adapter became available as video card options. Retailers often sold such models with less expensive, non-IBM hard disks. By mid-1986 IBM sold hard disks with only 20% of XTs.

In 1986, the 256-640 KB motherboard models were launched, which switched to half-height drives.

Submodels 268, 278 and 089 came with 101-key keyboards (essentially the IBM Model M, but in a modified variant that used the XT's keyboard

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