Osbone 1 was the first portable computer that was introduced in the market during 1981.Control program monitor, an operating system in 1970s was also used in Osbone 1 which was before the time when MS-Dos wiped it out completely at the time when IBM PC was introduced in 1981.

This machine being portable professionals were able to carry their data and vital information along with them. However, Osbone 1 did not support any batteries which were its biggest drawbacks. Hence, they were required to be plugged directly to an AC power.

Further, Kypro 11 was invented to be a perfect model rather than being a competitor of Osbone 1. Kypro 11 came with a software package that had double density floppy drives in contrast to Osbone 1. Also, Kypro 11 had twice the features both in screen and its storage capacity as compared to Osbone 1. Then Bondwell 2 was developed due to the decline of control program monitor. It was released in the market in 1985. But as standard computer platform began to look upon IBM PC thus in 1983 Compaq was launched.