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A file signature, also known as a magic number or magic byte, is a data used to identify or verify the content of a file. This web page lists various file signatures and their hexadecimal, ISO 8859-1, and extension codes.
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.
The Voynich manuscript is an illustrated codex written in an unknown script and language, dated to the early 15th century. It has been studied by codebreakers, cryptographers, and researchers, but its meaning and origin remain a mystery.
A prediction system for U.S. presidential elections based on 13 true/false statements about the country and political system. Developed by historian Allan Lichtman and geophysicist Vladimir Keilis-Borok, it has correctly predicted the outcomes since 1984.
A comprehensive and chronological table of the 45 men who have served as president of the United States since 1789, with their portraits, names, terms, parties, and vice presidents. Learn about the history, politics, and controversies of the American presidency.
Google Translate is a free online service that translates text, speech, images and websites between 243 languages. Learn about its development from a statistical machine translation to a neural machine translation, its various functions and features, and its usage and impact.
Learn about the equalities that involve trigonometric functions and are true for every value of the variables. Find the Pythagorean, reflection, shift, periodicity, angle sum and difference, and Ptolemy identities with examples and proofs.