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  2. Pascal's calculator - Wikipedia

    en.wikipedia.org/wiki/Pascal's_calculator

    the first calculator to have a controlled carry mechanism that allowed for an effective propagation of multiple carries [32] the first calculator to be used in an office (his father's to compute taxes) the first calculator commercialized (with around twenty machines built) [5] the first calculator to be patented (royal privilege of 1649) [33]

  3. Subnet (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Subnet_(mathematics)

    Importantly, a subnet is not merely the restriction of a net () to a directed subset of its domain . In contrast, by definition, a subsequence of a given sequence ,,, … is a sequence formed from the given sequence by deleting some of the elements without disturbing the relative positions of the remaining elements.

  4. Subnet - Wikipedia

    en.wikipedia.org/wiki/Subnet

    Creating a subnet by dividing the host identifier. A subnetwork, or subnet, is a logical subdivision of an IP network. [1]: 1, 16 The practice of dividing a network into two or more networks is called subnetting. Computers that belong to the same subnet are addressed with an identical group of its most-significant bits of their IP addresses.

  5. IPv4 - Wikipedia

    en.wikipedia.org/wiki/IPv4

    The first address in a subnet is used to identify the subnet itself. In this address all host bits are 0. To avoid ambiguity in representation, this address is reserved. [18] The last address has all host bits set to 1. It is used as a local broadcast address for sending messages to all

  6. Stepped reckoner - Wikipedia

    en.wikipedia.org/wiki/Stepped_reckoner

    It was the first calculator that could perform all four basic arithmetic operations. [ 3 ] Its intricate precision gearwork, however, was somewhat beyond the fabrication technology of the time; mechanical problems, in addition to a design flaw in the carry mechanism, prevented the machines from working reliably.

  7. HP-35 - Wikipedia

    en.wikipedia.org/wiki/HP-35

    Was the first scientific calculator to fly in space in 1973. [5] HP-35 calculators were carried on the Skylab 3 and Skylab 4 flights, between July 1973 and February 1974. [6] Is the first pocket calculator with a numeric range that covered 200 decades (more precise 199, ±10 ±99). [5]

  8. Busicom - Wikipedia

    en.wikipedia.org/wiki/Busicom

    They made the first calculator with a microprocessor for their top-of-the-line machines [4] and they were the first to make calculators with an all-in-one calculator chip, the Mostek MK6010, for their line of inexpensive machines. One of their last mechanical calculators is the HL-21, an Odhner type machine. [5]

  9. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    Casio fx-77, a solar-powered digital calculator from the 1980s using a single-line LCD. A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions.