Colleges are very similar to universities in that they also offer a large number of programs, however they typically do not have as many students and do not grant degrees. Instead of giving degrees a college typically grants diplomas or certificates.
Some colleges also offer what are called university transfer programs, which allow you to start a program at a college and then transfer to a university to finish your degree. Most colleges and universities publish transfer guides that tell you which programs can be transferred to which schools. For more information on transfer programs, contact an advisor or talk to your high school counsellor.