Our holdings include hundreds of glass and film negatives/transparencies that we've scanned ourselves; in addition, many other photos on this site were extracted from reference images (high-resolution tiffs) in the Library of Congress research archive. (To query the database click here.) They are adjusted, restored and reworked by your webmaster in accordance with his aesthetic sensibilities before being downsized and turned into the jpegs you see here. All of these images (including "derivative works") are protected by copyright laws of the United States and other jurisdictions and may not be sold, reproduced or otherwise used for commercial purposes without permission.
Vintage photos of:
June 1937. "Baltimore, Maryland. For every Social Security account number issued an 'employee master card' is made in the Social Security board records office. Testifying data, given on the application blank form SS-5, is transferred to this master card in the form of upended quadrangular holes, punched by key punch machines, which have a keyboard like a typewriter. Each key struck by an operator causes a hole to be punched in the card. The position of a hole determines the letter or number other machines will reproduce from the master card. From this master card is made an actuarial card, to be used later for statistical purposes. The master card also is used in other machines which sort them numerically, according to account numbers, alphabetically according to the name code, translate the holes into numbers and letters, and print the data on individual ledger sheets, indexes, registry of accounts and other uses. The photograph above shows records office workers punching master cards on key punch machines." Whew. Longest caption ever? Harris & Ewing Collection glass negative. View full size.