Perl
Perl online manual
A good start for beginners
UIUC Perl Introduction
Robert's Perl Tutorial
CGI starting with CGI
CGI FAQ
CGI learning and examples
SQL and PL/SQL tutorial and reference
MySQL tutorial
ORACLE SQL*Plus
Windows NT an outline
A Complete Guide to Networking Windows
Wang Wei's MCSE Tutorial on NT server 4.0
Unix introduction to UNIX
from DOS to UNIX
Work with VI/Ex Editor