MCSA

Short for Microsoft Certified Systems Administrator, the MCSA is an individual who has successfully passed the A+ certification, Network+ certification as well as other exams dealing with Microsoft Windows NT, 2000, XP, 2003, or later Microsoft operating system.
Users with a MCSA certification should have the experience of setting up, managing and supporting a network. These users will often have an administrator role in the company.

Also see: Administrator, Certification definitions, MCSE, Network definitions