I've done this myself on many occasions, even though I know it's a common mistake I need to watch out for.
The steps seem to go as follows (with typical thoughts in brackets):
- Walk up to photocopier carrying sheet/book to copy.
- Insert sheet. ("Which way round does this need to go?")
- Figure out the controls. ("How does this thing work again?")
- Stand for a while as lights flash and cogs whirr. ("Is it working? I hope it's quick.")
- Copy comes out. ("Great. At last.")
- Grab copied paper and rush out of room, leaving the original in the copier.
Can anyone suggest a way that the photocopier could be designed to prevent users making this mistake?
A sign would seem to be the most obvious way, but the trouble is that the moment I need to read it is likely to be the moment I'm least inclined to stop and read anything.