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

|Fewer Letters|More Letters| |-------|---------|---| |AR|Area Ratio (between rocket engine nozzle and bell)| | |Aerojet Rocketdyne| | |Augmented Reality real-time processing| | |Anti-Reflective optical coating| |GEO|Geostationary Earth Orbit (35786km)| |JWST|James Webb infra-red Space Telescope| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)|

^(4 acronyms in this thread; )^(the most compressed thread commented on today)^( has 7 acronyms.)
^([Thread #8597 for this sub, first seen 23rd Feb 2023, 00:12]) ^[FAQ] ^([Full list]) ^[Contact] ^([Source code])