ITU‐T's Technical Reports and Specifications 645 Annex 4 Abbreviations and acronyms 3D Three Dimensional 3G 3rd Generation mobile technology 4G 4th Generation mobile technology AM Amplitude Modulation AMR Automatic Meter Reading CENELEC European Committee for Electrotechnical Standardization DAS Distributed Antenna Systems DECT Digital Enhanced Cordless Telecommunication DVB‐T Digital Video Broadcasting ‐ Terrestrial DSL Digital Subscriber Line EIRP Equivalent Isotropic Radiated Power EMC ElectroMagnetic Compatibility EMF ElectroMagnetic Field EMR ElectroMagnetic Radiation ERP Effective Radiated Power FCC Federal Communications Commission FM Frequency Modulation Gbit/s Giga bits per second GHG Greenhouse Gas GPS Global Positioning System GSMA Global System for Mobile Communications Association GSM Global System for Mobile communications HF High Frequency HVAC Heating, Ventilation, and Air Conditioning IAC International Advisory Committee IARC International Agency for Research on Cancer IBC In‐Building Coverage ICNIRP International Commission on Non‐Ionizing Radiation Protection ICT Information and Communication Technology IEC International Electrotechnical Commission ISM Industrial, Scientific, and Medical