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IBM 603
The IBM 603 Electronic Multiplier was the first mass-produced commercial electronic calculating device; it used full-size vacuum tubes to perform multiplication and addition.IBM 603 The First Commercial Electronic Calculator IBM History, accessed September 21, 2020] (The earlier IBM 601 and released in the same year IBM 602 used relay logic.) The IBM 603 was adapted as the arithmetic unit in the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 601
The IBM 601 Multiplying Punch was a unit record machine that could read two numbers from a punched card and punch their product in a blank field on the same card. The factors could be up to eight decimal digits long. The 601 was introduced in 1931 and was the first IBM machine that could do multiplication. In 1936 W. J. Eckert connected a modified 601 to a 285 tabulator and an 016 duplicating punch through a custom switch he designed and used the combined setup to perform scientific calculations. Eckert, W.J.Punched Card Methods in Scientific Computation The Thomas J. Watson Astronomical Computing Bureau, Columbia University (1940) See also * IBM 602 * IBM 603 *IBM 604 The IBM 604 Electronic Calculating Punch was the world's first mass-produced electronic calculator along with its predecessor the IBM 603. References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calculator
An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid-state electronic calculator was created in the early 1960s. Pocket-sized devices became available in the 1970s, especially after the Intel 4004, the first microprocessor, was developed by Intel for the Japanese calculator company Busicom. Modern electronic calculators vary from cheap, give-away, credit-card-sized models to sturdy desktop models with built-in printers. They became popular in the mid-1970s as the incorporation of integrated circuits reduced their size and cost. By the end of that decade, prices had dropped to the point where a basic calculator was affordable to most and they became common in schools. In addition to general-purpose calculators, there are those designed for specific markets. For example, there are scientific calculators, which include trigonometric and statistical calculat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM CPC
The IBM Card-Programmed Electronic Calculator or ''CPC'' was announced by IBM in May 1949. Later that year an improved machine, the CPC-II, was also announced. IBM's electronic (vacuum tube) calculators could perform multiple calculations, including division. The card-programmed calculators used fields on punched cards not to specify the actual operations to be performed on data, but which "microprogram" hard-coded onto the plugboard of the IBM 604 or 605 calculator machine; a set of cards produced different results when used with different plugboards. The units could be configured to retain up to 10 instructions in memory and perform them in a loop. The original CPC Calculator has the following units interconnected by cables: *Electronic Calculating Punch **IBM 604 with reader/punch unit IBM 521 *Accounting Machine **IBM 402 or **IBM 417 The CPC-II Calculator has the following units interconnected by cables: *Electronic Calculating Punch **IBM 605 with punch unit IBM 527 *Acco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 604
The IBM 604 Electronic Calculating Punch was the world's first mass-produced electronic calculator along with its predecessor the IBM 603.IBM 603 The First Commercial Electronic Calculator IBM History, accessed September 21, 2020 It was an electronic unit record equipment, unit record machine that could perform multiple calculations, including division. It was invented and developed by Ralph Palmer, Jerrier A. Haddad, Jerrier Haddad and Byron Phelps. It was introduced by IBM in 1948. It could read a punched card from a deck, do some calculations based on the wiring of its plugboard, and punch results onto the same card. A separate IBM 521 Card Read/Punch processed the cards and had its own plugboard which selected the columns to be read and those to be punched. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 602
The IBM 602 Calculating Punch, introduced in 1946, was an electromechanical calculator capable of addition, subtraction, multiplication, and division. The 602 was IBM's first machine that did division. (The IBM 601, introduced in 1931, only multiplied.) Like other IBM calculators, it was programmed using a control panel. Input data was read from a punched card, the results could be punched in the same card or a trailing card. The 602 was available in four models: Model 1, Model 2, Model 50, and Model 51. The "Series 50" models were low-cost versions that ran at a slower speed, with half as many program steps, and fewer storage registers and counters. Two additional counters were available as an optional feature. Program steps execute in one machine cycle, except for steps performing multiplication or division which take as many machine cycles as needed for the operation. Punching rate is roughly four columns per machine cycle. The total number of machine cycles required per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tube
A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. It takes the form of an evacuated tubular envelope of glass or sometimes metal containing electrodes connected to external connection pins. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental Electronics, electronic functions such as signal amplifier, amplification and current Rectifier, rectification. Non-thermionic types such as vacuum phototubes achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light and measurement of its intensity. In both types the electrons are accelerated from the cathode to the anode by the electric field in the tube. The first, and simplest, vacuum tube, the diode or Flem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relay Logic
Relay logic is a method of implementing combinational logic in electrical control circuits by using several electrical relays wired in a particular configuration. Ladder logic The schematic diagrams for relay logic circuits are often called line diagrams, because the inputs and outputs are essentially drawn in a series of lines. A relay logic circuit is an electrical network consisting of lines, or rungs, in which each line or rung must have continuity to enable the output device. A typical circuit consists of a number of rungs, with each rung controlling an output. This output is controlled by a combination of input or output conditions, such as input switches and control relays. The conditions that represent the inputs are connected in series, parallel, or series-parallel to obtain the logic required to drive the output. The relay logic circuit forms an electrical schematic diagram for the control of input and output devices. Relay logic diagrams represent the physical in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arithmetic Logic Unit
In computing, an arithmetic logic unit (ALU) is a Combinational logic, combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit (FPU), which operates on floating point numbers. It is a fundamental building block of many types of computing circuits, including the central processing unit (CPU) of computers, FPUs, and graphics processing units (GPUs). The inputs to an ALU are the data to be operated on, called operands, and a code indicating the operation to be performed (opcode); the ALU's output is the result of the performed operation. In many designs, the ALU also has status inputs or outputs, or both, which convey information about a previous operation or the current operation, respectively, between the ALU and external status registers. Signals An ALU has a variety of input and output net (electronics), nets, which are the electrical conductors used to convey Digital signal (electroni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM SSEC
The IBM Selective Sequence Electronic Calculator (SSEC) was an electromechanical computer built by IBM. Its design was started in late 1944 and it operated from January 1948 to August 1952. It had many of the features of a stored-program computer, and was the first operational machine able to treat its instructions as data, but it was not fully electronic. Although the SSEC proved useful for several high-profile applications, it soon became obsolete. As the last large electromechanical computer ever built, its greatest success was the publicity it provided for IBM. History During World War II, International Business Machines Corporation (IBM) funded and built an Automatic Sequence Controlled Calculator (ASCC) for Howard H. Aiken at Harvard University. The machine, formally dedicated in August 1944, was widely known as the Harvard Mark I. The President of IBM, Thomas J. Watson Sr., did not like Aiken's press release that gave no credit to IBM for its funding and engineering effo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James W
James may refer to: People * James (given name) * James (surname) * James (musician), aka Faruq Mahfuz Anam James, (born 1964), Bollywood musician * James, brother of Jesus * King James (other), various kings named James * Prince James (other) * Saint James (other) Places Canada * James Bay, a large body of water * James, Ontario United Kingdom * James College, a college of the University of York United States * James, Georgia, an unincorporated community * James, Iowa, an unincorporated community * James City, North Carolina * James City County, Virginia ** James City (Virginia Company) ** James City Shire * James City, Pennsylvania * St. James City, Florida Film and television * ''James'' (2005 film), a Bollywood film * ''James'' (2008 film), an Irish short film * ''James'' (2022 film), an Indian Kannada-language film * "James", a television episode of ''Adventure Time'' Music * James (band), a band from Manchester ** ''James'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endicott, New York
Endicott is a Village (New York), village within the town of Union, New York, Union in Broome County, New York, United States. The population was 13,392 at the 2010 census. It is part of the Binghamton metropolitan area. The village is named after Henry B. Endicott, a founding member of the Endicott Johnson Corporation shoe manufacturing company, who founded the community as the "Home of the Square Deal". The village of Endicott is in the town of Union, New York, Union and is west of the city of Binghamton. The community is served by the Greater Binghamton Airport/Edwin A. Link Field. It is part of the "Triple Cities", along with Binghamton and Johnson City, New York, Johnson City. History The village of Endicott was originally made up of two distinct villages: Union village (now the historic business district at the intersection of New York State Highway 26, NYS Route 26 and New York State Highway 17C, NYS Route 17C), incorporated in 1892, and Endicott (whose center was along Was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tubes Octal, Miniature
A vacuum (: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective (neuter ) meaning "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a ''perfect'' vacuum, which they sometimes simply call "vacuum" or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space. In engineering and applied physics on the other hand, vacuum refers to any space in which the pressure is considerably lower than atmospheric pressure. The Latin term ''in vacuo'' is used to describe an object that is surrounded by a vacuum. The ''quality'' of a partial vacuum refers to how closely it approaches a perfect vacuum. Other things equal, lower gas pressure means higher-quality vacuum. For example, a typical vacuum cleaner produces enough suction to reduce air pressure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
