Welcome to the Infodata Library. This is a Service of The Travellers' Aid Society. At the very moment, mostly planetary data is available, plus mirrors of ship-designs (some of which aren't available somewhere else on net anymore).
Traveller is a science fiction roleplaying game with a fantastic, epic and very big background. The rules have been completely overthrown some four times and are ranging from awkward to state-of-the-art and back again..
We had a Traveller-campaign running using BRP-rules, so there's some stuff for that as well.