The first portable computer, developed by Adam Osborne and introduced in 1981. Floppy disk based with 64K of memory, it used the CP/M operating system and a modified version of the WordStar word processor that would display only 40 characters at a time across its tiny 4.5" CRT. It cost USD $1,795, which was considerably inexpensive for a computer of that era. Weighing in at nearly 30 pounds and requiring AC power, the Osborne was really more "transportable" than a true portable.
The Osborne I
We might chuckle at this today compared to our ultra-sleek laptops, but, for its time, the Osborne I was breakthrough technology. Adam Osborne started a revolution. (Equipment courtesy of Alfred J. Young.)