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

|Fewer Letters|More Letters| |-------|---------|---| |JPL|Jet Propulsion Lab, California| |LPSC|Liquid Propulsion Systems Centre| |MAV|Mars Ascent Vehicle (possibly fictional)| |UHF|Ultra-High Frequency radio|

^(4 acronyms in this thread; )^(the most compressed thread commented on today)^( has 37 acronyms.)
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