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
HA	Home Assistant automation software
~	High Availability
HTTP	Hypertext Transfer Protocol, the Web
HTTPS	HTTP over SSL
IP	Internet Protocol
NAS	Network-Attached Storage
NAT	Network Address Translation
PiHole	Network-wide ad-blocker (DNS sinkhole)
RPi	Raspberry Pi brand of SBC
SBC	Single-Board Computer
SSD	Solid State Drive mass storage
SSH	Secure Shell for remote terminal access
SSL	Secure Sockets Layer, for transparent encryption
TLS	Transport Layer Security, supersedes SSL
VPN	Virtual Private Network

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