12" iBook. Bought it used from a local guy for $650. He said he got it from a referral program 2 weeks, and it still looks new. Yes it has Tiger. OS X is going to take some getting used to, but it's cool so far. Now it's time to find cool programs and accessories for my new toy. The airport extreme card is badass. P.S. The built in speakerss SUUUUCK.