[jufo]

I worked for Decca Navigator in the 1970s. They had two ladies (not particularly little or old) who made read-only program memories for the Decca Omnitrac civil aircraft navigation computers. These had core arrays with the sense line hand-woven through the cores, going through a core or bypassing it depending on whether that bit should read as a 0 or a 1. They worked from printed charts referred to as 'knitting patterns'.