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FACOM 100
The FACOM 100 was an early electromechanical computer built by Fujitsu in 1954 which used binary-coded decimal arithmetic. The design of the later FACOM 128 was influenced by experience gained from building the FACOM 100. References See also * FACOM FACOM ("Fujitsu Automatic COMputer") is a trademark used for Fujitsu's computers. The first product is FACOM 100, built in 1954. In May 1990, the brand name of FACOM was abolished and changed to Fujitsu. FACOM numbering roughly follows the follow ... Electro-mechanical computers 1950s computers {{computer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromechanical Computer
A mechanical computer is a computer built from mechanical components such as levers and gears rather than electronic components. The most common examples are adding machines and mechanical counters, which use the turning of gears to increment output displays. More complex examples could carry out multiplication and division—Friden used a moving head which paused at each column—and even differential analysis. One model, the Ascota 170 accounting machine sold in the 1960s calculated square roots. Mechanical computers can be either analog, using smooth mechanisms such as curved plates or slide rules for computations; or digital, which use gears. Mechanical computers reached their zenith during World War II, when they formed the basis of complex bombsights including the Norden, as well as the similar devices for ship computations such as the US Torpedo Data Computer or British Admiralty Fire Control Table. Noteworthy are mechanical flight instruments for early spacecraft, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fujitsu
is a Japanese multinational information and communications technology equipment and services corporation, established in 1935 and headquartered in Tokyo. Fujitsu is the world's sixth-largest IT services provider by annual revenue, and the largest in Japan, in 2021. The hardware offerings from Fujitsu are mainly of personal and enterprise computing products, including x86, SPARC and mainframe compatible server products, although the corporation and its subsidiaries also offer a diversity of products and services in the areas of data storage, telecommunications, advanced microelectronics, and air conditioning. It has approximately 126,400 employees and its products and services are available in approximately 180 countries. Fujitsu is listed on the Tokyo Stock Exchange and Nagoya Stock Exchange; its Tokyo listing is a constituent of the Nikkei 225 and TOPIX 100 indices. History 1935 to 2000 Fujitsu was established on June 20, 1935, which makes it one of the oldest operating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binary-coded Decimal
In computing and electronic systems, binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits, usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow). In byte-oriented systems (i.e. most modern computers), the term ''unpacked'' BCD usually implies a full byte for each digit (often including a sign), whereas ''packed'' BCD typically encodes two digits within a single byte by taking advantage of the fact that four bits are enough to represent the range 0 to 9. The precise 4-bit encoding, however, may vary for technical reasons (e.g. Excess-3). The ten states representing a BCD digit are sometimes called '' tetrades'' (for the nibble typically needed to hold them is also known as a tetrade) while the unused, don't care-states are named , ''pseudo-decimals'' or ''pseudo-decimal digits''. BCD's main virtue, in comparison to binary posit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FACOM 128
The FACOM 128 was a relay-based electromechanical computer built by Fujitsu. Two models were made, namely the FACOM 128A, built in 1956, and the FACOM 128B, built in 1959. , a fully working FACOM 128B is still in working order, maintained by Fujitsu staff at a facility in Numazu in Shizuoka Prefecture. The FACOM 128B processes numbers using a bi-quinary coded decimal representation. See also * FACOM 100 * FACOM FACOM ("Fujitsu Automatic COMputer") is a trademark used for Fujitsu's computers. The first product is FACOM 100, built in 1954. In May 1990, the brand name of FACOM was abolished and changed to Fujitsu. FACOM numbering roughly follows the follow ... References External links * Electro-mechanical computers 1950s computers {{Compu-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FACOM
FACOM ("Fujitsu Automatic COMputer") is a trademark used for Fujitsu's computers. The first product is FACOM 100, built in 1954. In May 1990, the brand name of FACOM was abolished and changed to Fujitsu. FACOM numbering roughly follows the following scheme, but the numbering of some early relay computers is irregular: * 100s: relay computers * 200/210: parametron computers * 220 and above: electronic computers (transistors, integrated circuits) Products Relay computers Relay computers or electromechanical computers include: *FACOM 100, electromechanical computer built by Fujitsu in 1954 *FACOM 128, relay-based electromechanical computer built by Fujitsu in the late 1950s *FACOM 138A Irregularly numbered relay computers include: FACOM 318A, FACOM 415A, FACOM 416A, FACOM 426A, FACOM 426B,FACOM 514A,FACOM 524A Parametron computers *FACOM 200 *FACOM 201 *FACOM 202 *FACOM 212 shipped in 1959 Information Processing Society of Japan (IPSJ)"(Fujitsu) FACOM 200, 201, 202, 212 Para ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electro-mechanical Computers
In engineering, electromechanics combines processes and procedures drawn from electrical engineering and mechanical engineering. Electromechanics focuses on the interaction of electrical and mechanical systems as a whole and how the two systems interact with each other. This process is especially prominent in systems such as those of DC or AC rotating electrical machines which can be designed and operated to generate power from a mechanical process (generator) or used to power a mechanical effect (motor). Electrical engineering in this context also encompasses electronics engineering. Electromechanical devices are ones which have both electrical and mechanical processes. Strictly speaking, a manually operated switch is an electromechanical component due to the mechanical movement causing an electrical output. Though this is true, the term is usually understood to refer to devices which involve an electrical signal to create mechanical movement, or vice versa mechanical movement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
