The ICL DRS was a range of departmental computers from International Computers Limited (ICL). Standing originally for Distributed Resource System, the full name was later dropped in favour of the abbreviation. During the mid-1980s separate Office Systems business units had produced a disparate range of products including IBM-compatible PCs such as the PWS (a PC/AT clone), small servers branded DRS, and various larger Unix servers sold under the Clan range. A rebranding in late 1988 pulled these together under the DRS brand, with a consistent mid-grey and peppermint-green livery.