IBM 5100
Updated: 10/11/2017 by Computer Hope
The IBM 5100 is recognized as the first portable computer and was released in September 1975. The computer weighed 55 pounds and had a five inch CRT (cathode ray tube) display, tape drive, 1.9 MHz PALM processor, and 64 KB of RAM (random-access memory). The picture is an ad of the IBM 5100 taken from a November 1975 issue of Scientific American.