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  2. List of amateur radio modes - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_modes

    Amateur teleprinting over radio (AMTOR) D-STAR (Digital Data) a high speed (128 kbit/s), data-only mode. Hellschreiber, also referred to as either Feld-Hell, or Hell a facsimile-based teleprinter. Discrete multi-tone modulation modes such as Multi Tone 63 (MT63) Multiple frequency-shift keying (MFSK) modes such as. FSK441, JT6M, JT65, and FT8.

  3. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...

  4. All models are wrong - Wikipedia

    en.wikipedia.org/wiki/All_models_are_wrong

    All models are wrong. All models are wrong is a common aphorism and anapodoton in statistics; it is often expanded as "All models are wrong, but some are useful". The aphorism acknowledges that statistical models always fall short of the complexities of reality but can still be useful nonetheless.

  5. Identification friend or foe - Wikipedia

    en.wikipedia.org/wiki/Identification_friend_or_foe

    Identification, friend or foe ( IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio or infrared, may be used. [1]

  6. Glossary of video game terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_video_game_terms

    A development model where players are able to purchase and play a game as it currently stands, be it early in development or close to a full release. On the developer's end, early access allows them to gather player feedback and further the game's development with the money made from these sales. See also open beta. Elo hell

  7. Sensitive compartmented information facility - Wikipedia

    en.wikipedia.org/wiki/Sensitive_compartmented...

    A sensitive compartmented information facility ( SCIF / skɪf / ), in United States military, national security/national defense and intelligence parlance, is an enclosed area within a building that is used to process sensitive compartmented information (SCI) types of classified information . SCIFs can be either permanent or temporary and can ...

  8. Lasswell's model of communication - Wikipedia

    en.wikipedia.org/wiki/Lasswell's_model_of...

    Lasswell's model is one of the earliest and most influential models of communication. [3] : 109 It was first published by Harold Lasswell in his 1948 essay The Structure and Function of Communication in Society. [4] Its aim is to organize the "scientific study of the process of communication ". It has been described as "a linear and Uni ...

  9. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    A smartphone, often simply called a phone, is a mobile device that combines the functionality of a traditional mobile phone with advanced computing capabilities. It typically has a touchscreen interface, allowing users to access a wide range of applications and services, such as web browsing, email, and social media, as well as multimedia ...