2. Humans can manually keep track of versions of code! (1960s) As everything, to begin with there was no software. “At my first job, we had a Source Contr

2. Humans can manually keep track of versions of code! (1960s) As everything, to begin with there was no software. “At my first job, we had a Source Control department. When you had your code ready to go, you took your floppy disks to the nice ladies in Source Control, they would take your disks, duly update the library, and build the customer-ready product from the officially reposed source.” (Miles Duke) Balderdash! Floppies were first available in 1971. They had decks in the sixties. They had paper tape. But they didn't have floppies! So, using the terminology of decks, the author scores a validity check!