Martin Odersky, and Lex Spoon
In the eyes of many, the new collections framework is the most significant change in the Scala 2.8 release. Scala had collections before (and in fact the new framework is largely compatible with them). But it’s only 2.8 that provides a common, uniform, and all-encompassing framework for collection types.
This is a companion discussion topic for the original entry at http://docs.scala-lang.org//overviews/collections/introduction.html