Arnold Neustadter (25 August 1910 – 17 April 1996) was an American

inventor An invention is a unique or novel device, method, composition, idea or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an ...

and businessman. He invented the

Rolodex A Rolodex is a rotating card file device used to store business contact information. Its name, a portmanteau of the words ''rolling'' and ''index'', has become somewhat genericized (usually as ''rolodex'') for any personal organizer performing thi ...

desktop rotating card file and other office equipment with Danish engineer Hildaur Neilson, which has been called "a triumph of low technology" 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.History of the Rolodex
, about.com

References

{{DEFAULTSORT:Neustadter, Arnold 1910 births 1996 deaths 20th-century American inventors