Arnold Neustadter

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|name = Arnold Neustadter

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|birth_date = 25 August 1910

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|death_date = 17 April 1996

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|significant_projects = Rolodex

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Arnold Neustadter (25 August 1910 – 17 April 1996){{Cite news|last=Zuckerman|first=Laurence|date=1996-04-19|title=Arnold Neustadter Dies at 85; Orderly Mind Behind Rolodex (Published 1996)|language=en-US|work=The New York Times|url=https://www.nytimes.com/1996/04/19/us/arnold-neustadter-dies-at-85-orderly-mind-behind-rolodex.html|access-date=2021-01-14|issn=0362-4331}} was an American inventor and businessman. He invented the Rolodex desktop rotating card file and other office equipment with Danish engineer Hildaur Neilson,{{Cite web|date=2015-02-11|title=The History of the Rolodex|url=https://durakis.com/the-history-of-the-rolodex/|access-date=2021-01-14|website=Durakis Executive Search|language=en-US}} which has been called "a triumph of low technology"[https://web.archive.org/web/20121103000540/http://pqasb.pqarchiver.com/boston/access/59677235.html?dids=59677235:59677235&FMT=ABS&FMTS=ABS:FT&type=current&date=Nov+17,+1988&author=Nathan+Cobb,+Globe+Staff&pub=Boston+Globe+(pre-1997+Fulltext)&desc=ROLODEX+CARD+FILES:+A+TRIUMPH+OF+LOW+TECHNOLOGY&pqatl=google Rolodex Card Files: A Triumph of Low Technology], Boston Globe and "a lasting symbol of the art of networking".

Neustadter's earlier inventions included the Autodex, a spring-operated phone directory that automatically opened to the selected letter, Swivodex, an inkwell that did not spill, Punchodex, a paper hole puncher, and Clipodex, a transcription aid that attached to a stenographer's knee.[http://inventors.about.com/od/rstartinventions/a/Rolodex.htm History of the Rolodex] {{Webarchive|url=http://webarchive.loc.gov/all/20081107153618/http://inventors.about.com/od/rstartinventions/a/Rolodex.htm |date=2008-11-07 }}, about.com