This is how computer programming was done in those days. There was no such thing as a modern
terminal with a screen, and no keyboards.
A programmer would write her code first on paper (handwritten), then a specialist typist will transfer it to punch cards, using some machine, a kind of typewriter. After several rounds of proofreading, the punch cards will be fed to a computer. The output will be printed on
a wide paper strip as rows of text and numbers. What you see in this picture is probably the output. This output was called "wide print" (I don't know the exact English term, just translating from the Russian). I performed all this process as a student in the early 1970-s. Except the punch cards: they were produced by a specialist typist. So proofreading process was painful.