"SAS," from the Centre for Applied Statistics at Lancaster University
"Documentation for SAS Products and Solutions," from the SAS Institute
"Resources to Help You Learn and Use SAS," from UCLA's Academic Technology Services
"The SAS Portal," from UCLA's Academic Technology Services
"SAS Analyst for Windows Tutorial," from the ITS at the University of Texas-Austin
"SAS I: Getting Started," from the ITS at the University of Texas-Austin
"SAS II: Inferential Statistics," from the ITS at the University of Texas-Austin
"Frequently Asked Questions About SAS," from the University of Virginia's ITC Division
"Introduction to SAS Version 8.2," from the University of Virginia's ITC Division
"Introduction to SPSS" for Windows, from the Centre for Applied Statistics at Lancaster University
"SPSS for Windows II," from the Centre for Applied Statistics at Lancaster University
"Resources to Help You Learn and Use SPSS," from UCLA's Academic Technology Services
"The SPSS Portal," from UCLA's Academic Technology Services
"SPSS for Windows: Getting Started," from the ITS at the University of Texas-Austin
"SPSS for Windows: Displaying Data," from the ITS at the University of Texas-Austin
"Stata," from the Centre for Applied Statistics at Lancaster University
"Stata Tutorial," from Princeton University, Department of Economics
"Stata," from Princeton University, Office of Population Research
"Chapter 14: A Sample Session," from the Stata Corporation
"Frequently Asked Questions," from the Stata Corporation
"Resources for Learning Stata," from the Stata Corporation
"Resources to Help you Learn and Use Stata," from UCLA's Academic Technology Services
"Stata Topics: Graphics," from UCLA's Academic Technology Services
"The Stata Portal," from UCLA's Academic Technology Services
"A SAS User's Guide to Stata," from the UNC Carolina Population Center
"A Stata Tutorial," from the UNC Carolina Population Center