Editing 1973 in science (section)

==Technology==
* April 2 – The [[LexisNexis]] computerized legal research service begins.
* April 3 – The first handheld [[mobile phone]] call is made by [[Martin Cooper (inventor)|Martin Cooper]] of [[Motorola]] in [[New York City]].<ref>{{cite web|title=First Mobile Phone Call Was Placed Exactly 40 Years Ago|url=http://mashable.com/2013/04/03/first-mobile-phone-call/|publisher=Mashable|year=2013|accessdate=2013-04-03}}</ref>
* June 4 – A [[United States patent]] for the Docutel [[automated teller machine]] is granted to [[Donald Wetzel]], Tom Barnes and George Chastain.
* Ichiro Kato, Waseda University, develops the world's first full-scale [[humanoid robot]], Wabot-1.<ref>{{cite web|title=History of Industrial Robots|url=http://www.ifr.org/uploads/media/History_of_Industrial_Robots_online_brochure_by_IFR_2012.pdf|publisher=International Federation of Robotics|year=2012|accessdate=2013-04-03|url-status=dead|archiveurl=https://web.archive.org/web/20121224213437/http://www.ifr.org/uploads/media/History_of_Industrial_Robots_online_brochure_by_IFR_2012.pdf|archivedate=2012-12-24}}</ref>