Editing IBM 1620 (section)

==Notable uses==
An IBM 1620 model II was used by Vearl N. Huff, NASA Headquarters (FOB 10B, Washington DC) to program a three-dimensional simulation in [[Fortran]] of the tethered [[Project Gemini|Gemini]] capsule{{snd}} [[RM-81 Agena|Agena]] rocket module two-body problem at a time when it was not completely understood if it was safe to tether two objects together in space due to possible elastic tether induced collisions. The same computer was also used to simulate the orbits of the Gemini flights, producing printer-art charts of each orbit. These simulation were run over-night and the data examined the next day.<ref>Personal recollections of Donald N. Huff, son of Vearl N. Huff</ref>

In 1963 an IBM 1620 was installed at IIT Kanpur providing the kicker for India's software prowess.<ref>Jayant K Singh, The Spark, Icct 2021, IIT Kanpur</ref>

In 1964 at the Australian National University, Martin Ward used an IBM 1620 model I to calculate the order of the Janko group ''[[Janko group J1|J<sub>1</sub>]]''.<ref>Zvonimir Janko, [http://www.pnas.org/content/53/3/657.full.pdf ''A new finite simple group with abelian Sylow subgroups''], Proc. Natl. Acad. Sci. USA 53 (1965) 657-658</ref>

In 1966 the [[International Typographical Union|ITU]] produced an explanatory film on a 1963 system for [[typesetting]] by computer at the ''[[Washington Evening Star]]'', using an IBM 1620 and a Linofilm [[phototypesetting|phototypesetter]].<ref>{{Cite web
  |title=I.T.U. - Story of Technology
  |publisher=[[International Typographical Union]]
  |year=1966
  |url=https://vimeo.com/128146910
}}</ref>

In 1964 an IBM 1620 was installed at [[University of Iceland|The University of Iceland]], becoming the first computer in Iceland.<ref>{{Cite web|title=Ský - Fyrstu tölvurnar|url=https://www.sky.is/index.php/20-faghopar/oeldungadeild/123-fyrstu-toelvurnar|access-date=2021-11-02|website=www.sky.is|archive-date=2021-11-02|archive-url=https://web.archive.org/web/20211102113015/https://www.sky.is/index.php/20-faghopar/oeldungadeild/123-fyrstu-toelvurnar|url-status=dead}}</ref>