Oh my gosh, I'd forgotten about the ed joke (link at the bottom of the article). Magnificent stuff.

Not a line printer; those are very (very) different than a dot matrix printer, and it's an interesting use of a dot matrix printer, anyway.

They have the same sort of form feed, but usually with wider paper and green bars. iirc they print a whole line at a time, which is why they are so-named. It's easy to see how one would get confused, since there is `/dev/lp` and `lp` or `lpr`

yea, if I `man 4 lp` (manpage for the device) on Amazon Linux 2 it is telling me about "parallel line printers" -- (`man lp` (for the lp command) mentions "hardcopy device, such as a printer or microfilm recorder".)

Very cool nonetheless.

Ok, we've put dot matrix in the title line above.