IBM PC gets European launch at Which Computer Show. IBM XT released, it was fitted with the 8086(which could be replaced with an NEC V20 or V30) and had room for an 8087 maths co-processor to be installed. It also had a 10 Mb hard disk, 128 K of RAM, one floppy drive, mono monitor and a printer, all for $5000. MS-DOS Changed from MS-DOS 2.0 to MS-DOS 2.01 and MS-DOS 2.11 Introduced with the IBM XT this version included a UNIX style hierarchical sub-directory structure, and altered the way in which programs could load and access files on the disk. IBM released PC Junior in an attempt to get further into the home home market, it cost just $699. Cheaper alternative from other companies were more preferable to the home byer, but businesses continued to buy IBM. MS-DOS 2.25 included support for foreign character sets, and was marketed in the Far East.