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

Fewer Letters	More Letters
AP	WiFi Access Point
DNS	Domain Name Service/System
HASS	Home Assistant automation software
ISP	Internet Service Provider
IoT	Internet of Things for device controllers
NAT	Network Address Translation
NUC	Next Unit of Computing brand of Intel small computers
PoE	Power over Ethernet
VPN	Virtual Private Network

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