As far a data storage, files, etc., it was all done manually on paper and stored in file cabinets. Even grocery store chashiers had to manually punch in the price and department number of every...
There were no ATMs (they didn't come out 'til the early 1980s). When you went to your bank to cash a check, the teller had to pull a microfiche copy of your signature for verification.
Supermarkets did not really exist before the creation of computers. The lack of computers did not limit the creation of supermarkets, the idea of having a super market just didn't exist in the...