URL：https://www.thoughtco.com/thmb/tuRZNsEQr2hEVU8i4BGvHh_jaI8=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/microsoft-sign-at-the-entrance-of-their-silicon-valley-campus-471179856-5c3d5d9a46e0fb00016dd455.jpg
掲載元：https://www.thoughtco.com/microsoft-history-of-a-computing-giant-1991140
