HP-150 touchscreen personal computer with HP 9121 dual drives, 1983
The HP-150 personal computer featured a touch-sensitive screen that allowed users to activate a feature by touching the screen. The PC had an MS-DOS operating system and an Intel 8088 microprocessor. The HP-150 was introduced with twin 3-1/2 inch HP 9121 disc drives — the first commercially available 3-1/2 inch floppy-disk drives in the United States. These drives were less expensive, more reliable and held the same amount of information as the 5-1/4 inch IBM-compatible drives.