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Portable computer
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===Grid Compass=== [[File:Macintosh Portable-IMG 7541.jpg|thumb|Macintosh Portable (1989)]] [[File:GRiD Compass 1101 (1).jpg|thumb|Grid Compass (1982)]] The [[Grid Compass]] ran its own operating system, GRiD-OS. Its specialized software and high price (US$8,000β10,000) meant that it was limited to specialized applications. The main buyer was the U.S. government. NASA used it on the Space Shuttle during the early 1980s, as it was powerful, lightweight, and compact. The military Special Forces also purchased the machine, as it could be used by paratroopers in combat.<ref>{{Cite web|last=didyouknowwebsite|date=2020-06-14|title=The Space Age Best Inventions We use Today|url=https://didyouknowwebsite.com/2020/06/14/the-space-age-best-inventions-we-use-today/|access-date=2020-06-14|website=Did You Know?|language=en-US}}</ref>
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