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The Hamming weight is named after the American mathematician Richard Hamming, although he did not originate the notion. [5] The Hamming weight of binary numbers was already used in 1899 by James W. L. Glaisher to give a formula for the number of odd binomial coefficients in a single row of Pascal's triangle. [6]
The base-2 numeral system is a positional notation with a radix of 2.Each digit is referred to as a bit, or binary digit.Because of its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used by almost all modern computers and computer-based devices, as a preferred system of use, over various other human techniques of communication, because ...
A Univac 9400 disc based computer system ..." can have 2–8 8411 drives for 14.5–58 mega bytes capacity. The 8411 has a transfer rate of 156K bytes per second." - using megabytes in a decimal sense [49] Donald Morrison proposes to use the Greek letter kappa ("κ") to denote 1024 bytes, "κ 2" to denote 1024 × 1024, and so on. [50] (At the ...
According to the Pythagorean theorem, for a right triangle with side lengths and , the length of the hypotenuse can be calculated as +. This formula defines the Pythagorean addition operation, denoted here as : for any two real numbers and , the result of this operation is defined to be [3] = +.
Hexadecimal (also known as base-16 or simply hex) is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 and "A"–"F" to represent values from ten to fifteen.
Persian astronomer Abi Bakr of Isfahan invented a brass astrolabe with a geared calendar movement based on the design of Abū Rayhān al-Bīrūnī's mechanical calendar analog computer. [12] Abi Bakr's geared astrolabe uses a set of gear -wheels and is the oldest surviving complete mechanical geared machine in existence.
First implemented as a compile-and-go system rather than an interpreter, BASIC emerged as part of a wider movement towards time-sharing systems. General Electric, having worked on the Dartmouth Time-Sharing System and its associated Dartmouth BASIC, wrote their own underlying operating system and launched an online time-sharing system known as Mark I featuring a BASIC compiler (not an ...