1995 August 12, Tommy Thorn, “Re: Undo or Not”, in rec.games.go[1] (Usenet):
In general I think it is poor sportsmanship to gain on a[sic] opponent _physical_ slip (mouso, typo and such), but quite ok on _mental_ slips. I find it equally bad sport to _ask_ for undo, on a mental slip.
1998 October 23, in...@fdhoekstra.nl, “Re: [I] Rubik's Cube”, in alt.fan.pratchett[2] (Usenet):
Nice. How do you get it to back up, or start over? I made a mouso and now it's unsolveable.
1999 February 26, Stan Brown, “Re: Gravity - Two Questions”, in alt.usenet.offline-reader[3] (Usenet):
Just last night, I was selecting multiple files for deletion. I made a "mouso" and Windows thought I had double-clicked a bat file. I was reduced to ejecting the diskette to stop that batch file.