C++ FAQ Celebrating Twenty-One Years of the C++ FAQ!!!
(Click here for a personal note from Marshall Cline.)
Section 37:
37.1 What is the "STL"?
37.2 Where can I get a copy of "STL"?
37.3 How can I find a Fred object in an STL container of Fred* such as std::vector<Fred*>?
37.4 Where can I get help on how to use STL?
37.5 How can you tell if you have a dynamically typed C++ class library?
37.6 What is the NIHCL? Where can I get it?
37.7 Where can I ftp the code that accompanies "Numerical Recipes"?
37.8 Why is my executable so large?
37.9 Where can I get tons and tons of more information on C++ class libraries?
[37.4] Where can I get help on how to use STL?

Here are some resources (in random order):

Rogue Wave's STL Guide:

www2.roguewave.com/support/docs/sourcepro/edition9/html/stdlibug/index.html or stdcxx.apache.org/doc/stdlibug/index.html

The STL FAQ: butler.hpl.hp.com/stl/stl.faq

Kenny Zalewski's STL guide: www.cs.rpi.edu/projects/STL/htdocs/stl.html

STL Newbie's guide:

academic1.bellevue.edu/cpphome/stl/STL_newbie.html

SGI's STL Programmer's guide: www.sgi.com/tech/stl/

There are also some books that will help.