Example image of eyePlorer eyePlorer map for 'Automatic link establishment': De facto High frequency Standard Telecommunication circuit Central processing unit Modem Multiple frequency-shift keying Single-sideband modulation Logical address Channel (communications) Automatic sounding Bit error ratio Selective calling Handshaking Caller ID STANAG Computer software Consumer electronics Menu (computing) Global Positioning System SMS Text messaging High Frequency Internet Protocol Forward error correction Lookup table Message Polling (computer science) Signalling (telecommunications) Sounding Spoofing attack Store and forward Return channel United States Military Standard Interoperability Non-governmental organization NATO Force multiplication Line-of-sight propagation Subnetwork Near Vertical Incidence Skywave SATCOM Digital signal processing ARQ Redundancy (information theory) Robustness Installed base Computing platform U.S. Immigration and Customs Enforcement United States Coast Guard Amateur Radio Emergency Service