Microsoft Windows Server
Since 1996
Including Active Directory, Azure, and Small Business Server. Have managed innumerable print queues and file shares.

Microsoft Exchange
Since 1997
Including M365/O365 Azure and physical servers located in data centers as well as network closets
Nobody should host their own email server anymore.

IIS, Apache, NGINX
Since 1999
I have run my own website since 1995 and have managed a team of web developers.

Microsoft Sharepoint
Since 2003

Microsoft SQL / MySQL
Since 2007
I do not consider myself a DBA but I have managed multiple SQL servers as well as a couple of MySQL servers.

MacOS / AUX
1992-2008
OS X never succeeded as a server operating system.

Sun Solaris
1996
It has been many years since I’ve seen a Sun server or Sun workstation.