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

Fewer Letters	More Letters
CGNAT	Carrier-Grade NAT
DNS	Domain Name Service/System
NAT	Network Address Translation
PSU	Power Supply Unit
Plex	Brand of media server package
RAID	Redundant Array of Independent Disks for mass storage
SSD	Solid State Drive mass storage
UDP	User Datagram Protocol, for real-time communications
VPS	Virtual Private Server (opposed to shared hosting)
ZFS	Solaris/Linux filesystem focusing on data integrity

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