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For OS X releases beginning with 10.9, and for macOS releases, landmarks in California were used as public names. [94] For OS X releases beginning with 10.11, and for macOS releases, varieties of apples were used as internal code names. [93] Mac OS X: Cyan, Siam (in reference to joining Mac OS and Rhapsody) [90] Mac OS X Developer Preview 3 ...
A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves ), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver, which only receives transmissions. Two-way radios usually use a half-duplex communication channel ...
Walkie-talkie. Recreational, toy and amateur radio walkie-talkies. Assorted two-way FRS and GMRS walkie talkies with hand mic. A walkie-talkie, more formally known as a handheld transceiver ( HT ), is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio ...
The Family Radio Service ( FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band. It does not suffer the interference effects found on citizens' band (CB) at 27 MHz, or the 49 MHz band also ...
Code name. A code name, codename, call sign, or cryptonym is a code word or name used, sometimes clandestinely, to refer to another name, word, project, or person. Code names are often used for military purposes, or in espionage.
PTT ID. PTT ID, or Push-To-Talk ID, is a generic term for an automatic number identification (ANI) -like system used in two-way radio systems. It provides identification of the transmitting radio over the air, and is commonly used in selective calling /signaling systems, usually in commercial and public safety radio systems. PTT ID features are ...
Igen — Uhu Linux 2.0. IIb — Apple IIc (book-sized) IIp — Apple IIc (portable) Ikki — Apple Macintosh II. Indigo — Microsoft .NET communication technologies. Indium — Lunar Linux 1.5.0. Infinite Improbability Drive — TransGaming WineX 3.3. Instatower — Apple Macintosh Performa 6400. Interface Manager — Windows 1.0.
Digital mobile radio. Digital mobile radio (DMR) is a digital radio standard for voice and data transmission in non-public radio networks. It was created by the European Telecommunications Standards Institute (ETSI), [1] and is designed to be low-cost and easy to use. DMR, along with P25 phase II and NXDN are the main competitor technologies in ...