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

|Fewer Letters|More Letters| |-------|---------|---| |JWST|James Webb infra-red Space Telescope| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |SLS|Space Launch System heavy-lift| |SSME|Space Shuttle Main Engine|

^(4 acronyms in this thread; )^(the most compressed thread commented on today)^( has 18 acronyms.)
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