Part 1 is about sequence containers (like std::vector).
Part 2 is on associative containers (like std::map).
Part 3 discusses smart pointers (e.g. shared_ptr).
Part 8 is about regular expressions.
In part 9 new C++0x core language features like r-value references and move semantics are discussed.
And finally part 10 is about template metaprogramming and type traits.
Thank you Stephan and Channel 9 for this quality introduction to the STL!