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Land Mobile Radio Service (LMRS) - ''FCC Title 47 Part 90''; Private land mobile radio systems are used by companies, local governments, and other organizations for communication. Many businesses and industries throughout the world use it as their primary means of communication, especially from a fixed location to mobile units. These licensed systems often share frequencies with other private users in the United States. Land Mobile Radio Service (LMRS) also known is Land Mobile Radio (LMR) - ''FCC Title 47 Part 90''; Private land mobile radio systems are used by companies, local governments, and other organizations for communication. Many businesses and industries throughout the world use it as their primary means of communication, especially from a fixed location to mobile units. These licensed systems often share frequencies with other private users in the United States. Although the term "business band" refers to several discrete frequencies that are not grouped into a single band, examples of some of the frequencies are grouped by band and listed below. These charts also list other frequencies not specifically part of the "business band" but commonly used by businesses. An individual license is still required under GMRS rules. A few manufacturers added these DOT frequencies to Business radios in the 1990s to have more "channels" and aid in selling radios.LMRS use has far more allocation of the spectrum than does ham radio. Although the term "business band" refers to several discrete frequencies that are not grouped into a single band, examples of some of the frequencies are grouped by band and listed below. These charts also list other frequencies not specifically part of the "business band" but commonly used by businesses. An individual license is still required under [[GMRS]] rules. A few manufacturers added these DOT frequencies to Business radios in the 1990s to have more "channels" and aid in selling radios.===PMR===In the United Kingdom they have PMR / Private Mobile Radio or Professional Mobile Radio which is similar to LMRS in the United States. Like LMRS these are field radio communications systems which use portable, mobile, base station, and dispatch console radios.In general narrow band frequency modulation is the chosen form of modulation, although airport services use amplitude modulation. Typically a deviation of 2.5 kHz is used for FM and this enables a channel spacing of 12.5 kHz to be implemented. As the demands for PMR are high, it is necessary to make effective use of the channels available. This is achieved by re-using the frequencies in different areas. Base stations must be located sufficiently far apart so that interference is not experienced, and also selective calling techniques such as CTCSS and DTMF are used to ensure that as many mobiles as possible can use a given channel.*TETRA is a modern standard for digital private mobile radio (PMR) and public access mobile radio (PAMR).*MPT1327 is a popular PMR trunking system