- 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.
- Lake Washington Ship Canal (seattle.gov)
The grand opening of the Lake Washington Ship Canal was held on July 4, 1917. Designed by Seattle district engineer Hiram Chittenden of the U.S. Army Corps of Engineers, the canal’s construction was the result of more than five decades of discussion on how to connect the saltwater of Puget Sound to the freshwater of Lake Washington via Lake Union. Early planners envisioned heavy use by coal and naval vessels, but today the locks are predominantly filled with pleasure crafts. The City of Seattle’s role included engineering, legal, and public works projects as new bridges, roads, water supply infrastructure and more were required to accommodate the implications of the Ship Canal on Seattle’s shape and size. The exhibits below provide insight into how the Ship Canal shaped Seattle’s social, physical, and environmental history.