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Happy 40th anniversary to DOS!

40 years ago today (August 12, 1981) IBM released the IBM Personal Computer 5150. This was the first IBM “PC” and became the basis for all PCs today. (There were other “personal computers” before this, such as the ever-popular Apple II or Commodore personal computers. “Personal Computer” was what you called a computer that would fit on a desk and you could take home with you. It was a personal computer.) And most importantly: IBM released PC DOS 1.0 with the IBM PC, so today also marks the 40th anniversary of the DOS operating system!