Osborne 1
The Osborne 1 was the first commercially successful portable microcomputer.
It weighed 11 kg, cost US$1,795, and ran the then-popular CP/M 2.2 operating system.
Technical specifications of computer Osborne 1
Manufactured by: Osborne
Launched: 1981
Manufactured in 
USA
CPU: Z80
@ 4MHz
Memory: 64 KB
Support A: Diskette 5¼"
Support B: Diskette 5¼"
Hard drive:
None
Operating system: CP/M 2.2
Its design owes much to the Xerox NoteTaker, a prototype developed at Xerox PARC in 1976.
Its main shortcomings were the tiny 5-inch (13 cm) display, with a resolution of 24 lines by 52 characters, and the floppy disks, which lacked sufficient capacity for business applications.
