Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

|Fewer Letters|More Letters| |-------|---------|---| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |NERVA|Nuclear Engine for Rocket Vehicle Application (proposed engine design)| |NTP|Nuclear Thermal Propulsion| | |Network Time Protocol| |NTR|Nuclear Thermal Rocket| |RTG|Radioisotope Thermoelectric Generator|

^(5 acronyms in this thread; )^(the most compressed thread commented on today)^( has 12 acronyms.)
^([Thread #8482 for this sub, first seen 25th Jan 2023, 13:17]) ^[FAQ] ^([Full list]) ^[Contact] ^([Source code])