Osborne 1
[Vin18]
The Osborne 1 is the first commercially successful portable computer, released on April 3, 1981 by Osborne Computer Corporation. It weighs 24.5 lb (11.1 kg), cost US$1,795, and runs the CP/M 2.2 operating system. It is powered from a wall socket, as it has no on-board battery, but it is still classed as a portable device since it can be hand-carried when the keyboard is closed.
Introduced: March 1981
Available: June 1981
Price: US $1,795 ($9,000 CAD in 2025)
Weight: 24.5 pounds / 11 kg
CPU: Zilog Z80 @ 4.0 MHz
RAM: 64K RAM
Display: built-in 5″ CRT monitor
52 x 24 text
Ports: parallel / IEEE-488
modem / serial port
Storage: dual 5-1/4 inch floppy drives
OS: CP/M on diskette
Donated by: Arlen Michaels