Wed, 20 May 1998 18:55:16 +0200 wenzelm tuned;
Wed, 20 May 1998 15:20:28 +0200 nipkow Small mods.
Tue, 19 May 1998 17:16:18 +0200 wenzelm prompt made part of source;
(0) -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip