Glasgow-based PD library run by Alan Scully. Similar in execution to Robot PD - the two libraries were implacably hostile - it had perhaps a less imaginative range of programs but faster delivery. Among its original programs were Pagemaker (sold in a commercial, homebrew version as Pagemaker Deluxe) and the Mac games. Scull later became Scull SL ('Software Library') and was taken over by Graeme Chesser. It had its own fanzine, CPC Domain.