The "T" means Topo, but they are the 100k topo maps, basically useless for anything but driving roads. Save yourself some money and buy the "s" or "sc" if you think you need a camera. You will want to load some 24k topos anyway.
I bought the 62T a few months ago, awesome GPS but like I said the 100k maps are not very useful, at least for hunting and hiking.