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

|Fewer Letters|More Letters| |-------|---------|---| |BO|Blue Origin (Bezos Rocketry)| |ICBM|Intercontinental Ballistic Missile| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |RCS|Reaction Control System| |Roscosmos|State Corporation for Space Activities, Russia|

|Jargon|Definition| |-------|---------|---| |hydrolox|Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer| |hypergolic|A set of two substances that ignite when in contact|

^(7 acronyms in this thread; )^(the most compressed thread commented on today)^( has 33 acronyms.)
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