There was a very early (1985-6?) app called "Selectric." When you ran it, it immediately exited, leaving you wondering what the point was. Until the next time y

There was a very early (1985-6?) app called "Selectric." When you ran it, it immediately exited, leaving you wondering what the point was. Until the next time you started typing: every key you typed made a "Chunk!" sound, the spacebar went "-diggit-", and the return key went "zzzzz...DING." Way fun.