Yes, a single variable notification in code, could cost THOUSANDS just because someone would punch ONE card with the new data, compile it (with no errors), save it on a cassete tape, (write the label of the tape with a new version number) and deliver it to the customer. There were no monitors. Computers would have a "BOITIER" (a rectangular box of coloured lamps) who coould have 3 meanings, ON, OFF and BLINKING. We're talking about 16 light points, and the interpretation of those lights would have the answer for the completed action. 3 whites and 3 reds would mean "No errors on compiling". But that action only verified syntax. Logic was another department :)
'till the 80's, french was the computer dominating language. Terms like "Octeto" (portuguese for byte) were derived from french glossary (tehy had laws to prevent the english tech term colonization and still today they have a french word for every english counterpart). So, "Ordenadores" was pretty common. And before electronics took over, we had "Electrológica", refering mixed hardware like Burroughs or Gestetner.