What is the difference between Baptists, Catholics & Christians?

I think both Baptists and Catholics consider themselves "Christians". The difference between Catholics and Baptists is Catholics believe you have to confess your sins to a priest, and do however many Hail-Marys, while Baptists believe you confess straight to God, and He simply forgives you. I'm pretty sure Baptists also participate in communion, but it's different--they don't usually drink wine, instead they drink grape juice, and Baptists don't believe you're actually eating Christ's flesh--it's just symbolic. Baptist services last more than 10 minutes, and happen more than once a week. Catholics have additional books in their Bible, that Baptists don't have. Many Baptists think Catholics are idol worshipers, because they have "Saint so-and-so"