It really depends on the manufacturer and which vehicle you're driving. The 99 Camry has a belt for the Power steering, the alternator and the A/C compressor. In some ways this is good. If one belt breaks, you may still be able to drive the vehicle..that's not always the case with a serpentine belt.
〉 Answered on Apr 24th, 2007 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines