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

|Fewer Letters|More Letters| |-------|---------|---| |ESA|European Space Agency| |EVA|Extra-Vehicular Activity| |RTG|Radioisotope Thermoelectric Generator|

^(3 acronyms in this thread; )^(the most compressed thread commented on today)^( has 12 acronyms.)
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