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The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.
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 ...
"In this publication, the letters K, M and G denote the multipliers 2 10, 2 20 and 2 30 respectively. Although the letters are borrowed from the decimal system and stand for kilo 10 3, mega 10 6 and giga 10 9 they do not have decimal meaning but instead present the power of 2 closest to the corresponding power of 10." IBM 341 4-inch Diskette ...
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.
This is equivalent to 3 × 6 + 4, which is 22 decimal. Additionally, this method is the least abstract way to count using two hands that reflects the concept of positional notation , as the movement from one position to the next is done by switching from one hand to another.
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 ...
[2] c. 1000 Abū Rayhān al-Bīrūnī invented the Planisphere, an analog computer. [3] He also invented the first mechanical lunisolar calendar which employed a gear train and eight gear-wheels. [4] This was an early example of a fixed-wired knowledge processing machine. [5] [dubious – discuss] c. 1015