Standard template library (STL) documentation from SGI. This is a mirror of the content that used to be on SGIs site. They recently removed it. Thanks to Martin for backing it up for all of us.
This documentation discusses a lot of the design principles behind the STL, and rationale for why certain decisions were made. It also explains Alex Stepanov's concepts which he uses in the STL, but could not be expressed in the code (ForwardIterator, RegularType, etc). As far as I know, this information is not in any of the current documentation.
Other information related to the design of the STL.