ed is the standard text editor.
Line taken from the
original Unix manual page on ed, an ancient
line-oriented editor that is by now used only by a few
Real Programmers, and even then only for batch operations. The
original line is sometimes uttered near the beginning of an emacs vs. vi
holy war on Usenet, with the (vain) hope to quench
the discussion before it really takes off. Often followed by a standard
text describing the many virtues of ed (such as the small memory
footprint on a Timex Sinclair, and the consistent
(because nearly non-existent) user interface).