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  2. President of the United States - Wikipedia

    en.wikipedia.org/wiki/President_of_the_United_States

    The president of the United States ( POTUS) [B] is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces . The power of the presidency has grown substantially [12] since the first president ...

  3. Pascal (unit) - Wikipedia

    en.wikipedia.org/wiki/Pascal_(unit)

    bar: 10 −5 bar. barye (CGS unit) 10 Ba. The pascal (symbol: Pa) is the unit of pressure in the International System of Units (SI). It is also used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. The unit, named after Blaise Pascal, is an SI coherent derived unit defined as one newton per square metre (N ...

  4. United States - Wikipedia

    en.wikipedia.org/wiki/United_States

    The first documented use of the phrase "United States of America" is a letter from January 2, 1776. Stephen Moylan, a Continental Army aide to General George Washington, wrote to Joseph Reed, Washington's aide-de-camp, seeking to go "with full and ample powers from the United States of America to Spain" to seek assistance in the Revolutionary War effort.

  5. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex, bidirectional traffic.

  6. List of countries by GDP (nominal) - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_GDP...

    according to International Monetary Fund estimates [n 1] [1] Countries by nominal GDP in 2019 [n 2] > $20 trillion. $10–20 trillion. $5–10 trillion. $1–5 trillion. $750 billion – $1 trillion. $500–750 billion. $250–500 billion.

  7. Columbia University - Wikipedia

    en.wikipedia.org/wiki/Columbia_university

    Columbia University, officially Columbia University in the City of New York, is a private, Ivy League, research university in New York City.Established in 1754 as King's College on the grounds of Trinity Church in Manhattan, it is the oldest institution of higher education in New York and the fifth-oldest in the United States and is considered one of the most prestigious universities in the world.

  8. Pythagorean theorem - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_theorem

    In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.

  9. Stephen Gilfus - Wikipedia

    en.wikipedia.org/wiki/Stephen_Gilfus

    Stephen Gilfus. Stephen Gilfus is an American businessman, entrepreneur, architect and engineer known as "The Father of Modern E-Learning". He is a founder of Blackboard Inc. and CourseInfo LLC, where he held executive positions from 1997 to 2007. In July 2007, Gilfus started a global education think tank in Washington, DC, focused on education ...