- IBM PC DOS 1.00 (pcjs.com)
PC DOS 1.00 was completed in August 1981 and announced at an IBM press conference on August 12, 1981, when IBM introduced the original IBM PC (Model 5150). It was released on one single-sided (160Kb) diskette, and included 23 BASIC Programs.
- Microsoft Windows 3.00 (pcjs.org)
The PCjs machine below starts Microsoft Windows 3.00, using an IBM PC AT running PC DOS 3.20.
- Microsoft Windows 3.10 (pcjs.com)
The PCjs machine below starts Microsoft Windows 3.10, using an IBM PC AT running PC DOS 3.30.
- The South Pointing Spoon (hakaimagazine.com)
On a bronze plate, the little metal spoon balances exquisitely on its bowl. Each time it’s tossed or spun, it comes to rest with its neck aiming south. This is a replica of the aptly named south pointing spoon, thought to be the first magnetized object ever used to tell direction. And it was the crucial precursor to the magnetic compass, one of the most important inventions in maritime history.
- IBM PC DOS (Wikipedia)
IBM PC DOS (an acronym for IBM Personal Computer Disk Operating System), also known as PC DOS or IBM DOS, is a discontinued disk operating system for the IBM Personal Computer, its successors, and IBM PC compatibles. It was manufactured and sold by IBM from the early 1980s into the 2000s. Developed by Microsoft, it was also sold by that company as MS-DOS. Both operating systems were identical or almost identical until 1993, when IBM began selling PC DOS 6.1 with new features. The collective shorthand for PC DOS and MS-DOS was DOS, which is also the generic term for disk operating system, and is shared with dozens of disk operating systems called DOS.