I came across this sentence:
It Will Work On Acer or Dell System with SLP1? What is SLP1?
I think it's a typo - and it's meant to say "SP1" - as in service pack 1, presumably windows XP.
If this is stupid, could you perhaps show us a bit more of the context?
it probably is indeed a Typo, but probably not Windows XP service pack 1 but Windows Vista Service pack 1, becouse thats newer, and xp already got SP3