I was disappointed to see that Hewlett Packard Enterprise has decided to remove the old SGI STL documentation from its website. Although rather old, I thought the documentation was the best introduction to the STL available.
Fortunately, I had downloaded the documentation a while ago, so I have made it available on my site here:
Standard Template Library Programmer’s Guide.
I hope you find it as useful as I do.
Update: Justin has put the documentation on GitHub here: sgi-stl-docs. Thanks, Justin!