Ahhhhhhh, strictly speaking that would be a textually-encoded (probably ASCII) hexadecimal representation of the binary values. You don't want to hear about true binary programming, which involves a switch for each bit on the address/data bus, a switch to select whether you're going to enter an address or data, a switch to step the address, and a switch to load the data. That is how we used to boot the machine -- enter enough code to tell the machine how to read a paper tape, feed a paper tape that had enough code to tell the machine how to read mag tape, then read the appropriate program in off mag tape. The word, "boot", comes from that process, as in lifting oneself up by one's bootstraps
. Foisting such worthless drivel off on others is one of the few joys of being aged.