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UNIVAC 418
The UNIVAC 418 was a transistorized computer made by Sperry Univac. It had 18-bit words and used magnetic-core memory. The name came from its 4-microsecond memory cycle time and 18-bit word. The assembly language for this class of computers was TRIM III and ART418. Over the three different models, more than 392 systems were manufactured. It evolved from the Control Unit Tester (CUT), a device used in the factory to test peripherals for larger systems. Architecture The instruction word had three formats: :''Format I'' - common Load, Store, and Arithmetic operations *f - Function code (6 bits) *u - Operand address (12 bits) :''Format II'' - Constant arithmetic and Boolean functions *f - Function code (6 bits) *z - Operand address or value (12 bits) :''Format III'' - Input/Output *f - Function code (6 bits) *m - Minor function code (6 bits) *k - Designator (6 bits) used for channel number, shift count, etc. Numbers were represented in ones' complement, single and double precis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transistor Computer
A transistor computer, now often called a second-generation computer, is a computer which uses discrete transistors instead of vacuum tubes. The first generation of electronic computers used vacuum tubes, which generated large amounts of heat, were bulky and unreliable. A second-generation computer, through the late 1950s and 1960s featured circuit boards filled with individual transistors and magnetic-core memory. These machines remained the mainstream design into the late 1960s, when integrated circuits started appearing and led to the third-generation computer. History The University of Manchester's experimental Transistor Computer was first operational in November 1953 and it is widely believed to be the first transistor computer to come into operation anywhere in the world. There were two versions of the Transistor Computer, the prototype, operational in 1953, and the full-size version, commissioned in April 1955. The 1953 machine had 92 point-contact transistors and 5 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Button (computing)
In computing, a button (sometimes known as a command button or push button) is a Graphical control element (software), graphical control element that provides the user a simple way to trigger an event (computing), event, like searching for a query at a search engine, or to interact with dialog boxes, like confirming an action. Overview A typical button is a rectangle or rounded rectangle, wider than it is tall, with a descriptive caption in its center. Other buttons may be square or round, with simple Icon (computing), icons. The most common method of pressing a button is clicking it with a pointer (user interface), pointer controlled by a mouse (computing), mouse, or a touchpad, but other input such as keystroke can be used to execute the command of a button. However, a button is not always restricted to a rectangular shape. The sole requirement of button interaction is that the user can execute a command by a point-and-click, click action. Thus, pictures and background areas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Electronics Of The United States
A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. Militaries are typically authorized and maintained by a sovereign state, with their members identifiable by a distinct military uniform. They may consist of one or more military branches such as an army, navy, air force, space force, marines, or coast guard. The main task of a military is usually defined as defence of their state and its interests against external armed threats. In broad usage, the terms "armed forces" and "military" are often synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include other paramilitary forces such as armed police. Beyond warfare, the military may be employed in additional sanctioned and non-sanctioned functions within the state, including internal security threats, crowd control, promotion of political agendas, emergency services and reconstruction, pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UNIVAC Hardware
UNIVAC (Universal Automatic Computer) was a line of electronic digital stored-program computers starting with the products of the Eckert–Mauchly Computer Corporation. Later the name was applied to a division of the Remington Rand company and successor organizations. The BINAC, built by the Eckert–Mauchly Computer Corporation, was the first general-purpose computer for commercial use, but it was not a success. The last UNIVAC-badged computer was produced in 1986. History and structure J. Presper Eckert and John Mauchly built the ENIAC (Electronic Numerical Integrator and Computer) at the University of Pennsylvania's Moore School of Electrical Engineering between 1943 and 1946. A 1946 patent rights dispute with the university led Eckert and Mauchly to depart the Moore School to form the Electronic Control Company, later renamed Eckert–Mauchly Computer Corporation (EMCC), based in Philadelphia, Pennsylvania. That company first built a computer called BINAC (BINary Automat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
System Source Computer Museum
The System Source Computer Museum, located in Hunt Valley, Maryland, USA, exhibits notable computing devices from ancient times until the present. Over 5,000 objects are on display and many of the computational devices are operational. STEM activities are offered to organized tour groups. Admission is $15 for adults, $10 for students, children, veterans, and first responders. The museum is open weekdays from 9:00am until 6:00pm by appointment. Museum docents are available to lead tours. The National Electronics Museum is in the same building, and admission provides access to both museums. History The museum's origins date to 1981 when a Baltimore ComputerLand franchise had computers in inventory that instantly became historic artifacts with the introduction of the IBM Personal Computer. The museum was incorporated as a non-profit 501(c)(3) in 2018 as the Maryland Technology Museum with the trade name the System Source Computer Museum. In 2021, the museum became the new home o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aberdeen Proving Grounds
Aberdeen Proving Ground (APG) is a U.S. Army facility located adjacent to Aberdeen, Harford County, Maryland, United States. More than 7,500 civilians and 5,000 military personnel work at APG. There are 11 major commands among the tenant units, including: * United States Army Communications-Electronics Command (CECOM) * United States Army Combat Capabilities Development Command (CCDC) * United States Army Test and Evaluation Command (ATEC) * Edgewood Arsenal * Adelphi Laboratory Center ** The Army Reserve Information Operations Command ** Unified Cross Domain Services Management Office ** HQ, U.S. Army Contracting Command (Army Contracting Command –APG, Adelphi Contracting Division) ** U.S. Army 93rd Signal Network - Network Enterprise Center ** Logistics Readiness Center ** U.S. Army Cyber Operation Group – 335th Signal Command ** Blossom Point Research Facility History APG is the U.S. Army's oldest active proving ground, established on October 20, 1917, six months afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal London Hospital
The Royal London Hospital is a large teaching hospital in Whitechapel in the London Borough of Tower Hamlets. It is part of Barts Health NHS Trust. It provides district general hospital services for the City of London and Tower Hamlets and specialist tertiary care services for patients from across London and elsewhere. The current hospital building has 1248 beds and 34 wards. It opened in February 2012. The hospital was founded in September 1740 and was originally named the London Infirmary. The name changed to the London Hospital in 1748, and in 1990 to the Royal London Hospital. The first patients were treated at a house in Featherstone Street, Moorfields. In May 1741, the hospital moved to Prescot Street, and remained there until 1757 when it moved to its current location on the south side of Whitechapel Road, Whitechapel, in the London Borough of Tower Hamlets. The hospital's roof-top helipad is the London's Air Ambulance operating base. History Origins By the middle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UNIVAC 1100/60
The UNIVAC 1100/60, introduced in 1979, at Liechtenstein Computermuseum continued the venerable UNIVAC 1100 series first introduced in 1962 with the . The 1107 was the first 1100-series machine introduced under the name. Like its predecessors, it had support for multiple ; initially only two, but later up to four. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Department Of Water Resources
The California Department of Water Resources (DWR) is part of the California Natural Resources Agency and is responsible for the management and regulation of the State of California's water usage. The department was created in 1956 by Governor Goodwin Knight following severe flooding across Northern California in 1955, where they combined the Division of Water Resources of the Department of Public Works with the State Engineer's Office, the Water Project Authority, and the State Water Resources Board. It is headquartered in Sacramento. History 1850-1875 California recognizes many types of water rights. Prior to the Treaty of Guadalupe Hidalgo, signed in 1848, California was part of Mexico. Riparian rights were the most prevalent type of water right. Under riparian rights, which have their origins in Roman law, a landowner can use water flowing by his property for use on his property. When California became part of the United States, the United States agreed to recognize exis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floating-point Arithmetic
In computing, floating-point arithmetic (FP) is arithmetic on subsets of real numbers formed by a ''significand'' (a Sign (mathematics), signed sequence of a fixed number of digits in some Radix, base) multiplied by an integer power of that base. Numbers of this form are called floating-point numbers. For example, the number 2469/200 is a floating-point number in base ten with five digits: 2469/200 = 12.345 = \! \underbrace_\text \! \times \! \underbrace_\text\!\!\!\!\!\!\!\overbrace^ However, 7716/625 = 12.3456 is not a floating-point number in base ten with five digits—it needs six digits. The nearest floating-point number with only five digits is 12.346. And 1/3 = 0.3333… is not a floating-point number in base ten with any finite number of digits. In practice, most floating-point systems use Binary number, base two, though base ten (decimal floating point) is also common. Floating-point arithmetic operations, such as addition and division, approximate the correspond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AN/SPG-55
The AN/SPG-55 was an American tracking / illumination radar for RIM-2 Terrier, Terrier and RIM-67 Standard missiles (SM-1ER/SM-2ER). It was used for target tracking and surface-to-air missile, surface-to-air missile guidance as part of the Mk 76 missile fire control system. It was controlled by a UNIVAC 418, UNIVAC 1218 computer. In accordance with the Joint Electronics Type Designation System (JETDS), the "''AN/SPG-55''" designation represents the 55th design of an Army-Navy electronic device for waterborne fire control radar system. The JETDS system also now is used to name all Department of Defense electronic systems. Design Overall Layout The AN/SPG-55B antenna assembly consists of two separate antennas: the main antenna, which provides the track beam, guidance beam, and Continuous-wave radar, cwi beam, and the capture antenna, which provides the capture beam. The capture-guidance mode is employed for control of beam-riding missiles, and the track cwi mode is used for semi- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memory (computers)
Computer memory stores information, such as data and programs, for immediate use in the computer. The term ''memory'' is often synonymous with the terms '' RAM,'' ''main memory,'' or ''primary storage.'' Archaic synonyms for main memory include ''core'' (for magnetic core memory) and ''store''. Main memory operates at a high speed compared to mass storage which is slower but less expensive per bit and higher in capacity. Besides storing opened programs and data being actively processed, computer memory serves as a mass storage cache and write buffer to improve both reading and writing performance. Operating systems borrow RAM capacity for caching so long as it is not needed by running software. If needed, contents of the computer memory can be transferred to storage; a common way of doing this is through a memory management technique called ''virtual memory''. Modern computer memory is implemented as semiconductor memory, where data is stored within memory cells built from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
