You will need the full version of the software you intend to use for your company. For Web administrators, HTML, XML, try to avoid java script to prevent hijacking and redirects of the legit web sites or use any web development software you feel comfortable with.
DataBase administrator, I would suggest something no one is using such as Access or Excel they have web capabilities when using Frontpage or html.
Network Administrator the best is NT 4.0 if you can find it. The Windows operation is a triple operating system, it has networking in safe mode, server capabilities with mmc snapins or purchase a windows server for full control of your web admin, and database admin duties. I would not recommend upgrades, these are usually malware/spyware operating systems that uses Remote terminals from an unknown location to boot your computers, networks, and servers. Avoid upgrades RT's they are dangerous. There is no support from Microsoft with RT Eulas'.
I would like a simple list of the software that is needed for certain positions within the company.