From 1981
>Microsoft, which needed an operating system for the IBM Personal Computer,[9][10] hired Tim Paterson in May 1981 and bought 86-DOS 1.10 for US$25,000 that July
From 1981
>Microsoft, which needed an operating system for the IBM Personal Computer,[9][10] hired Tim Paterson in May 1981 and bought 86-DOS 1.10 for US$25,000 that July