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

Fewer Letters	More Letters
ICMP	Internet Control Message Protocol (ping, TTL exceeded, etc)
ISP	Internet Service Provider
IoT	Internet of Things for device controllers
SSH	Secure Shell for remote terminal access
VPN	Virtual Private Network
VPS	Virtual Private Server (opposed to shared hosting)

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