modemanual wrote in post #4678699
... thought that USM stood for unsharp mask, which explained the high quality of images that came out of it. At that time, i knew nothing about anything photographic.
Should I be ashamed?

USM Carter the Unstoppable Sex Machine (band)
USM Koh Samui, Thailand (Airport Code)
USM Ultimate Soccer Manager (soccer game)
USM Ultimate Spider-Man (comic)
USM Ultrasonic Meter
USM Ultrasonic Motor
USM Un-Scheduled Maintenance
USM Underwater-To-Surface Missile
USM Unified Security Manager (policy)
USM Uniform Sampling Method
USM Uniform Staffing Methodology
USM Unit Sergeant Major
USM United States Mail
USM United States Marines
USM United States Marshal
USM United States Military
USM United States Militia (Battlefield 1942 clan)
USM Universal Service Market
USM Universal Synthesizer Module
USM Universidad Santa María (Caracas, Venezuela)
USM Universidad Santa María (Valparaiso, Chile)
USM Universiti Sains Malaysia
USM University of Saint Mary (Leavenworth, Kansas)
USM University of Southern Maine (Portland and Gorham, Maine, USA)
USM University of Southern Mindanao
USM University of Southern Mississippi
USM University System of Maryland
USM Unlisted Securities Market
USM Unsharp Masking (image/edge sharpening technique)
USM User Schedule Message (NASA)
USM User Security Manual
USM User Security Model
USM User Session Manager
USM User-based Security Model (Simple Network Management Protocol)
from this source