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| English | Bulgarian |
| dual-tone multiple-frequency | сигнализиране с двучестотни тонове (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies) |
| frequency hopping | честотно превключване (The switching of frequencies within a given bandwidth during a point-to-point transmission) |
| line screen frequency | честота на растера (The fineness or coarseness of a halftone screen represented by lines per inch (LPI)) |
| radio frequency identification | установяване на радио честота (A technology that uses radio frequencies to identify products. An RFID-capable product has an RFID tag that can transmit information, such as serial number, to an RF reader, which converts the information into digital data that can be sent to a computer) |
| radio frequency identification sensor | сензор за откриване на радиочестота (A type of sensor (such as a proximity sensor) that uses radio frequency identification (RFID) for a numerous purposes, such as identification of physical items, automatic log on, location of people, etc) |