I am reading The Cuckoo's Egg by Cliff Stoll. Page 13 of my copy says:
Truly, the super-user is all-powerful: she controls the horizontal, she controls the vertical.
I am not familiar with this phrase. However, it is very similar to something I heard in a totally different place.
In the song "UHF" by "Weird Al" Yankovic (written as a theme song for his 1989 film of the same name) there is a line that goes:
Don't you know that we control the horizontal, we control the vertical too
The line in the song is relevant because the song is about televisions, which control a scanning beam to move horizontally and vertically across the TV screen.
I have only ever heard the notion of "control the horizontal, control the vertical" in the Weird Al song, and my attempts to search for this phrase online came up short. I looked for "to control the horizontal and the vertical" and got irrelevant hits.
The song and the book both came out in 1989 so it is unlikely that either got it from the other.
Is this phrase in common use? Does it have any particular meaning besides "having absolute control"?