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| |BE-4|Blue Engine 4 methalox rocket engine, developed by Blue Origin (2018), 2400kN| |BO|Blue Origin (Bezos Rocketry)| |EELV|Evolved Expendable Launch Vehicle| |ILC|Initial Launch Capability| |N1|Raketa Nositel-1, Soviet super-heavy-lift ("Russian Saturn V")| |NSSL|National Security Space Launch, formerly EELV| |RD-180|RD-series Russian-built rocket engine, used in the Atlas V first stage| |SLS|Space Launch System heavy-lift| |ULA|United Launch Alliance (Lockheed/Boeing joint venture)|

|Jargon|Definition| |-------|---------|---| |Raptor|Methane-fueled rocket engine under development by SpaceX| |Starlink|SpaceX's world-wide satellite broadband constellation| |engine-rich|Fuel mixture that includes engine parts on fire| |methalox|Portmanteau: methane fuel, liquid oxygen oxidizer|

^(13 acronyms in this thread; )^(the most compressed thread commented on today)^( has 22 acronyms.)
^([Thread #8612 for this sub, first seen 25th Feb 2023, 01:34]) ^[FAQ] ^([Full list]) ^[Contact] ^([Source code])