Released in June 1981 by the
Osborne Computer Corporation, the Osborne 1 is considered to be the first true portable, full-featured computer.
It includes all the components required to be a completely useful and operational computer system:
two built-in floppy drives which hold 91K of data each, with floppy disk storage compartments
a detachable full-size keyboard with numeric keypad
a built-in, albeit small, monochrome CRT monitor.
runs the CP/M Operating System, the most popular OS at the time.