Morse code — Chart of the Morse code letters and numerals Morse code is a method of transmitting textual information as a series of on off tones, lights, or clicks that can … Wikipedia
Pulse-code modulation — PCM redirects here. For other uses, see PCM (disambiguation). Pulse code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form for digital audio in computers and various Blu ray, Compact Disc and … Wikipedia
Mobile Network Code — A Mobile Network Code (MNC) is used in combination with a Mobile Country Code (MCC) (also known as a MCC / MNC tuple ) to uniquely identify a mobile phone operator/carrier using the GSM/LTE, CDMA, iDEN, TETRA and UMTS public land mobile networks… … Wikipedia
Country code — For the ISO standards which specify short codes for language names, see ISO 639. For international phone dialing codes, see List of country calling codes. For the rules of behaviour in the British countryside, see The Country Code. Oceania… … Wikipedia
airway beacon — Beacons used to mark airway segments in remote mountainous areas. These beacons flash lights in Morse code to identify beacon sites … Aviation dictionary
Distress radiobeacon — PLB redirects here. For other uses, see PLB (disambiguation). Emergency position indicating radio beacons or EPIRBs Distress radio beacons, also known as emergency beacons, ELT or EPIRB, are tracking transmitters which aid in the detection and… … Wikipedia
Letter beacon — Signal of letter beacon D on 5137.5 kHz Letter beacons are radio transmissions of uncertain origin, which consist of only a single repeating Morse Code letter. They are also often referred to as: SLB, or Single Letter Beacons SLHFB, or… … Wikipedia
Beacon — For other uses, see Beacon (disambiguation). A beacon is an intentionally conspicuous device designed to attract attention to a specific location. Beacons can also be combined with semaphoric or other indicators to provide important information,… … Wikipedia
Emergency vehicle lighting — refers to any of several visual warning devices, which may be known as light bars or beacons, fitted to a vehicle and used when the driver wishes to convey to other road users the urgency of their journey, to provide additional warning of a… … Wikipedia
Radio propagation beacon — A radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on HF, VHF, UHF, and microwave frequencies.… … Wikipedia