All of that is true. Also, deployment from the cited date range of 1967 to 1981 didn't mean the same for a lot of software as it does today. For an integrated m

All of that is true. Also, deployment from the cited date range of 1967 to 1981 didn't mean the same for a lot of software as it does today. For an integrated mainframe and minicomputer hardware and software business with a bunch of isolated customer sites and huge support contracts, we're talking customer outreach and physical media at the barest minimum. There's no "push to production" automated pipeline that publishes to a web server or package update that gets picked up from the repo by the next system cron at the customer's site over a fiber connection.