Are Catholics and Christians the same thing?

[MarkWurmple]

So, we all know of the Catholic and Christian religions. But what I'm wondering is...are they the same thing? Sure there's differences, like infant baptism in Catholicism, and differing ideas about where you go when you die and what not...but is a Catholic considered a Christian? They are, it seems, two different ways of worship with their own tradditions and what not. Some one help me out here.