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

|Fewer Letters|More Letters| |-------|---------|---| |BFG|Big Falcon Grasshopper ("Locust"), BFS test article| |BFR|Big Falcon Rocket (2018 rebiggened edition)| | |Yes, the F stands for something else; no, you're not the first to notice| |BFS|Big Falcon Spaceship (see BFR)| |CME|Coronal Mass Ejection| |CST|(Boeing) Crew Space Transportation capsules| | |Central Standard Time (UTC-6)| |ESA|European Space Agency| |EUS|Exploration Upper Stage| |GEO|Geostationary Earth Orbit (35786km)| |HLS|Human Landing System (Artemis)| |ICPS|Interim Cryogenic Propulsion Stage| |ITS|Interplanetary Transport System (2016 oversized edition) (see MCT)| | |Integrated Truss Structure| |Isp|Specific impulse (as explained by Scott Manley on YouTube)| | |Internet Service Provider| |KSP|Kerbal Space Program, the rocketry simulator| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |MCT|Mars Colonial Transporter (see ITS)| |NERVA|Nuclear Engine for Rocket Vehicle Application (proposed engine design)| |NRHO|Near-Rectilinear Halo Orbit| |SLS|Space Launch System heavy-lift| |SRB|Solid Rocket Booster| |SSME|Space Shuttle Main Engine| |TLI|Trans-Lunar Injection maneuver| |TMI|Trans-Mars Injection maneuver|

|Jargon|Definition| |-------|---------|---| |Raptor|Methane-fueled rocket engine under development by SpaceX| |Starliner|Boeing commercial crew capsule CST-100| |ablative|Material which is intentionally destroyed in use (for example, heatshields which burn away to dissipate heat)| |apogee|Highest point in an elliptical orbit around Earth (when the orbiter is slowest)|

^(23 acronyms in this thread; )^(the most compressed thread commented on today)^( has 10 acronyms.)
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