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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.
Learn about the different types and categories of top-level domains (TLDs) in the Domain Name System of the Internet. See the list of 1502 TLDs, including generic, country code, infrastructure, and test domains, with their names, entities, and notes.
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.
ISO 639 is a standardized nomenclature used to classify languages. This table lists all two-letter codes (set 1) and some of the three-letter codes (sets 2–5) for each language, along with their names, types and scopes.
Learn about the port numbers used by protocols for network applications, such as well-known ports, registered ports, and dynamic ports. See the table legend, the table cells, and the references and notes for more details.
The Electoral College is the group of presidential electors that votes for the president and vice president every four years in the U.S. The number of electors each state has depends on its congressional delegation, and a majority of 270 or more is required to win.
Reflected binary code, also known as Gray code, is an ordering of the binary numeral system such that two successive values differ in only one bit. Learn the history, function, and visualization of Gray code from this Wikipedia article.
Pennsylvania is a state in the northeastern United States with a rich and diverse history, culture, and natural features. Learn about its colonial origins, role in the American Revolution and Civil War, geography, population, state symbols, and more.