Editing 1971 in science (section)

==Computer science==
* July 4 – [[Michael S. Hart]] posts the first [[e-book]], a copy of the [[United States Declaration of Independence]], on the [[University of Illinois at Urbana–Champaign]]'s [[mainframe computer]], the origin of [[Project Gutenberg]].<ref>{{cite web|url=https://www.gutenberg.org/about/background/history_and_philosophy.html|publisher=Project Gutenberg|title=The History and Philosophy of Project Gutenberg|first=Michael|last=Hart|date=August 1992|access-date=2011-10-05}}.</ref>
* November 3 – The ''[[Unix]] Programmer's Manual'' is published.
* November 15 – [[Intel]] release the world's first [[microprocessor]], the [[Intel 4004|4004]].
* November/December – [[Computer Space]] is released, the first [[arcade video game]].
* [[Ray Tomlinson]] sends the first [[ARPAnet]] [[e-mail]] between host computers, at [[BBN Technologies|BBN]], [[Cambridge, Massachusetts]], with the first use of the [[@ sign]] in an address.<ref>{{cite web|first=Ray |last=Tomlinson |title=The First Network Email |url=http://openmap.bbn.com/~tomlinso/ray/firstemailframe.html |access-date=2011-10-05 |url-status=dead |archive-url=https://web.archive.org/web/20060506003539/http://openmap.bbn.com/~tomlinso/ray/firstemailframe.html |archive-date=2006-05-06 }}</ref>
* [[Kenbak-1]] goes on sale, considered to be the world's first [[personal computer]] by the [[Computer History Museum]] and the [[American Computer Museum]].
* The earliest [[floppy disk]]s, 8 inches in diameter, become commercially available as components of products shipped by [[IBM]], their inventor.