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![Baltimore, Md. For each block of 1,000 social security account applications 'work' cards are prepared. One work card is made for each operation incident to seeting up individual accounts and necessary indexes. The photograph above shows a worker in the Social Security Board Records Office at work at the 'visible control' rack. Each card in this rack represents an operation completed on one block[?] of applications. By glancing at each compartment in the rack, the number of operations completed can be estimated at once](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE5MzcvMDEvMDEvYmFsdGltb3JlLW1kLWZvci1lYWNoLWJsb2NrLW9mLTEwMDAtc29jaWFsLXNlY3VyaXR5LWFjY291bnQtYXBwbGljYXRpb25zLXdvcmstMTAyNC5qcGc%3D/40/32/webp "Baltimore, Md. For each block of 1,000 social security account applications 'work' cards are prepared. One work card is made for each operation incident to seeting up individual accounts and necessary indexes. The photograph above shows a worker in the Social Security Board Records Office at work at the 'visible control' rack. Each card in this rack represents an operation completed on one block[?] of applications. By glancing at each compartment in the rack, the number of operations completed can be estimated at once")
Baltimore, Md. For each block of 1,000 social security account applica...
Public domain photograph of electronic equipment, processor, control panel, technology, free to use, no copyright restrictions image - Picryl description
Baltimore, Md. For each block of 1,000 social security account applica...
A woman in a floral dress holding a file cabinet, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Date based on date of negatives... More