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

Fewer Letters More Letters RP-1 Rocket Propellant 1 (enhanced kerosene) RPi Raspberry Pi brand of SBC SBC Single-Board Computer SRB Solid Rocket Booster VPN Virtual Private Network Jargon Definition Starlink SpaceX’s world-wide satellite broadband constellation

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