What does ESCU stand for?

Erie Shores Credit Union (FLAA)

Escarpment-Undersea - GeoNet geographic features code (GEON)

Eskimo Curlew - Common English name - Scientific name: Numenius Borealis - American Ornithologists Union four-character bird identification (IBP)

Excelsior Shipping - Intermodal shipping container symbol (TVRC)

Extended Service and Cooling Umbilical (NASA)