Tiger Name (Score 1)

Three things: 1. Is Tiger the actual name of OS X 10.4, or is it just an internal codename that got popularized? Apple could just argue that their product is OS X 10.4 and not called "tiger" 2. Doesn't a company that hold a trademark HAVE to defend it or chance losing their trademark. This could simply be TigerDirect just preventing the loss of the trademark 3. TigerDirect has waited already even though Tiger has been announced for several months now. Would they already lose their trademark?