From: utzoo!henry Newsgroups: hacknews Title: dc, bc fixed Article-I.D.: utzoo.2803 Posted: Mon Feb 7 20:00:55 1983 Received: Mon Feb 7 20:00:55 1983 Dc(1) has been fixed so that if its input is a tty and the -q option is not specified, it prints a message telling how to exit from it. This is a bit of a blemish, but "dc" is too damned close to "cd" for comfort, and confusion has been observed several times. At the same time I cleaned up dc's option handling slightly, and therefore had to fix up bc(1) not to invoke dc using an obsolete option.