IBM considered the 68000 for the IBM PC but chose the Intel 8088 because the 68000 was not ready; Walden C. Rhines wrote that thus "Motorola, with its superior technology, lost the single most important design contest of the last 50 years". (IBM Instruments briefly sold the 68000-based IBM System 9000 laboratory computer systems.) The 68k instruction set is particularly well suited to implement Unix, and the 68000 and its successors became the dominant CPUs for Unix-based workstations including Sun workstations and Apollo/Domain workstations. The 68000 also is used for mass-market computers such as the Apple Lisa, Macintosh, Amiga, and Atari ST. The 68000 is used in Microsoft Xenix systems, as well as an early NetWare Unix-based Server. The 68000 is used in the first generation of desktop laser printers, including the original Apple Inc. LaserWriter and the HP LaserJet.