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A radar beacon (racon) is a device that returns a distinctive signal when triggered by a radar, providing range, bearing and identification information. Learn about the principle of operation, the characteristics, the applications and the proposal for enhanced RACON.
10-4 is a police code for "okay" or "acknowledged" in the United States. Learn about the origin, types, and examples of police codes, such as California's Hundred Code and 10-codes.
Learn about the telephone number prefixes for reaching foreign countries or areas via international telecommunication networks. Find out the country code for Niger (227) and other countries in different world zones.
Adderall is a combination of amphetamine salts used to treat ADHD and narcolepsy. It can cause side effects such as insomnia, loss of appetite, and addiction, and has different effects depending on the dose and enantiomer.
Dextroamphetamine is a stimulant drug that treats ADHD and narcolepsy, and has various medical and recreational uses. It works by affecting the monoamine neurotransmitters in the brain, and can have side effects, dependence, and legal status.
Bead Window is a code word used by various military forces to indicate the last transmission potentially disclosed unauthorized information. It is one of the American standardized brevity code words for multiservice operations and does not include words unique to single service operations.
Wikipedia is a multilingual online project that provides free access to information on various topics. You can browse articles, images, news, and more on the main page or explore other areas and languages of Wikipedia.
A comprehensive overview of the Unicode characters, covering 161 modern and historical scripts, as well as multiple symbol sets. Learn how to reference Unicode characters using numeric or entity codes, and see the control codes and special characters.