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  2. United States Air Force Stability and Control Digital DATCOM

    en.wikipedia.org/wiki/United_States_Air_Force...

    In February 1976, work commenced to automate the methods contained in the USAF Stability and Control DATCOM, specifically those contained in sections 4, 5, 6 and 7.The work was performed by the McDonnell Douglas Corporation under contract with the United States Air Force in conjunction with engineers at the Air Force Flight Dynamics Laboratory in Wright-Patterson Air Force Base.

  3. Concatenation - Wikipedia

    en.wikipedia.org/wiki/Concatenation

    A spreadsheet's concatenate ("&") function is used to assemble a complex text string—in this example, XML code for an SVG "circle" element. In formal language theory and computer programming, string concatenation is the operation of joining character strings end-to-end. For example, the concatenation of "snow" and "ball" is "snowball".

  4. Hadamard matrix - Wikipedia

    en.wikipedia.org/wiki/Hadamard_matrix

    Let H be a Hadamard matrix of order n.The transpose of H is closely related to its inverse.In fact: = where I n is the n × n identity matrix and H T is the transpose of H.To see that this is true, notice that the rows of H are all orthogonal vectors over the field of real numbers and each have length .

  5. cat (Unix) - Wikipedia

    en.wikipedia.org/wiki/Cat_(Unix)

    <filename command arg1 arg2 argn Beyond other benefits, the input redirection forms allow command to perform random access on the file, whereas the cat examples do not. This is because the redirection form opens the file as the stdin file descriptor which command can fully access, while the cat form simply provides the data as a stream of bytes.

  6. Concatenated SMS - Wikipedia

    en.wikipedia.org/wiki/Concatenated_SMS

    In technical terms, the concatenated SMS could also be referred to as a PDU Mode SMS [dubious – discuss].The number of parts that a multi-part or PDU mode SMS message may contain depends technically upon a header message but mostly upon the device sending or receiving the SMS and also upon the service provider.