In computer science or printers/typewriters, there is a concept called "line feed" (abbrev. LF). What does the word "feed" mean here?
Line feed originally meant to advance paper in a printer by one line. It's analogous to a carriage return on a typewriter, though I'm not sure if the term "line feed" was ever used for typewriters when they were the primary tool for producing print. It now also means to move a cursor forward one line on a computer screen.
The original meaning for line feed, moving paper forward by a single increment, gives us the sense of the word feed that it uses. Just as we might feed a draft horse to keep it working, we are feeding the machine paper one line at a time so that it can continue working. This corresponds with one of the common verb forms of feed:
feed (v.) supply (a machine) with material, power, or other things necessary for its operation.
Feed, verb form definition 2 from Google.
Line feed in the context of computer science has a slightly different meaning. When you press
Enter in a text document, it is represented as a line feed
CR carriage return characters on Windows, or a sigle
LF character on other operating systems such as Linux or Mac. These are special characters, usually not shown by default in most of the visual editors.