Eckert, W. J.; Thomas J. Watson Astronomical Computing Bureau, New York (1940). Punched card methods in scientific computation. New York: The Thomas J. Watson Astronomical Computing Bureau, Columbia University. Archived from the original on 2020-06-12. Retrieved 2018-04-17.
"file". Oxford English Dictionary (onlineed.). Oxford University Press.(Subscription or participating institution membership required.) Recorded from 1525: "A string or wire, on which papers and documents are strung for preservation and reference. Later extended to various other appliances for holding papers so that they can be easily referred to."
Eckert, W. J.; Thomas J. Watson Astronomical Computing Bureau, New York (1940). Punched card methods in scientific computation. New York: The Thomas J. Watson Astronomical Computing Bureau, Columbia University. Archived from the original on 2020-06-12. Retrieved 2018-04-17.
Popular Science. Bonnier Corporation. February 1950. p.96. Archived from the original on 2022-01-09. Retrieved 2014-03-07.
