The SAS software system provides a set of powerful tools for managing, processing, and analyzing data. SAS has long maintained a reputation for robustness and reliability, and it has become the de facto standard for many kinds of statistical analysis.
Official SAS Manuals
- SAS/STAT 9.2 User's Guide 
- SAS 9.2 Companion for UNIX Environments , a useful resource for running SAS on a remote UNIX/Linux server
Online tutorials and demos
- Learning materials for SAS , maintained by the UCLA Statistical Consulting Group
- SAS Users Group Report: An Animated Guide to Basic Parallel Processing