ports (one of them supported RS-422) HP-IB (IEEE-488) HP-HIL (standard on HP-150 II, but an optional add-on card on HP-150) Storage Supported HP-IB attached storage: Reception BYTE in November 1984 called HP-150 "an extremely flexible machine", but "difficult to program". Successors The two-CPU HP-120 (aka HP 45600A) Z80 CP/M machine also used the 9121 drives. HP-150 II (aka HP 45849A) replaced HP-150 in 1984. While still called HP Touchscreen II, the touchscreen was no longer standard, but rather a rarely-adopted option. The optional touchscreen bezel was superior to the original bezel, in that the emitters and detectors were now located behind a solid infrared-transparent plastic; thus removing the need to regularly clean the holes found in the original model. HP-150 II had the same footprint as HP-150, but came in a larger housing to accommodate its 12-inch screen, but could no longer accommodate an internal printer. HP-150 II had four expansion slots available (as opposed to two), and could accommodate an optional 8087 co-processor board. There were some minor compatibility problems between HP-150 and HP-150 II in the video subsystem. In 1985, HP introduced the Vectra, which InfoWorld stated was the company "responding to demands from its customers for full IBM PC compatibility". HP repositioned HP-150 as a workstation for the HP 3000 minicomputer. See also List of Hewlett-Packard products HP Roman-8 References Bibliography The Definitive HP150 Catalog. The 1991 Edition. Personalized Software External links HP-150 Hewlett-Packard HP-150 HP's Virtual Museum: 6-views of the HP-150 HP Computer Museum: 100 Series, also HP-150 Software 150 Touchscreens