A human may "say" things to a computer by typing them on a TERMinal. "To list a directory verbosely, say "ls -l"." Tends to imply a newline-TERMinated command (a "sentence"). A computer may "say" things to you, even if it doesn' t have a speech synthesiser, by displaying them on a TERMinal in response to your commands. This usage often confuses mundanes. [Jargon File]