AMS
Weather
1. Air Mass - a body of air covering a relatively wide area and exhibiting horizontally uniform properties.
2. American Meteorological Society
Defense
Aerodynamic Maneuvering System
Storage
Account Migrator Service. A service installed on a Windows NT or Windows 2000 system that automatically migrates Windows NT domain users to the filer /etc/passwd file. AMS also has a command-line interface that enables manual control of NT domain user migrations. Developed by Network Appliance.