Wikipedia tells me I had to wait until OS X Leopard in 2006 to first use Spaces. It does mention earlier 3rd party structures in an outside reference but the Wayback link quoted doesn't actually mention it.
I have some vague idea I'd been using it since years before, maybe even since System/Mac OS 8 or 9; but my memory is very vague and I cannot find any reference to what non-Apple substitute I had used before, or if I am simply mis-remembering.
I know I've had dual screens since the mid 90s, a 3-button mouse since around the same time (before scroll-wheels) but I can't be clear as to whether I did indeed have something akin to Spaces. Really my only truly clear recollection from so far back is ConflictCatcher, compulsory util from around that time ;)
The word 'spaces' is also a terrible word to try to google.
Can anyone help jog my memory?