I used to be an IT professional but I am tired of the constant change in technology. At last I stopped taking any exam to renew my certificates (e.g. MCSE, CNE, CCNA.). In the past I posted many computing tips on my website, but needless to say, they became obsolete within a short period time. Although occasionally I update some of the following write-ups (e.g. SAS),  most of them are outdated. I left them here as historical archives. Please contact me if you need more current information.

Statistical analysis, psychometrics, and database:


Progamming/scripting languages:



Over the years my colleagues and I used various tools (e.g. Hyperrcard, Authorware, Director, Flash) to develop several multimedia tutorials. Some of them are unreadbale because the tools are no longer supported (e.g. HyerCard). Nonetheless, the following can still work today.