Here's where you can find links to sport card companies. Know of a company that should be added?? Write me at junkfood@hotmail.com and let me know!!
Topps - The Grand Daddy of sports cards, learn all about Topps and O-Pee-Chee. Non sport cards too!!
Upper Deck - Bursting onto the scene in the late 80's, I feel Upper Deck changed the hobby forever. Great looking cards.