In true Atari style they jumped on the IBM PC compatible bandwagon of the mid-80s and produced some beautifully engineered machines - built in their own Fabs and featuring pretty much no generic parts......of course this meant they were more expensive than the IBM compatibles made by world+dog at the time so they didn't sell too well.
The PC2 is an 8086 machine with ubiquitous MFM hard drive and 5 1/4" floppy, but it also featured a standard Atari floppy drive socket and decent colour graphics.