[aDevilInMe]

Do you not maintain threads, RegEx etc... ? At best STL can be reffered to as a subset of the Standard Library, which contains the algorithms and containers framework. I take Stroustrup's word over a maintainer with the intials STL, who has an interest to keep calling it by this name.

[to3m]

No, the STL doesn't exist any more, at least as a going concern. That's why it's metonymy. It sounds like you're thinking of synecdoche.