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Mouse (computing)
A computer mouse (plural mice, sometimes mouses) is a hand-held pointing device that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, which allows a smooth control of the graphical user interface of a computer. The first public demonstration of a mouse controlling a computer system was in 1968. Mice originally used two separate wheels to track movement across a surface: one in the X-dimension and one in the Y. Later, the standard design shifted to utilize a ball rolling on a surface to detect motion. Most modern mice use optical sensors that have no moving parts. Though originally all mice were connected to a computer by a cable, many modern mice are cordless, relying on short-range radio communication with the connected system. In addition to moving a cursor, computer mice have one or more buttons to allow operations such as the selection of a menu item on a display. Mice often also feat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trackball
A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes—like an upside-down ball mouse with an exposed protruding ball. Users roll the ball to position the on-screen pointer, using their thumb, fingers, or the palm of the hand, while using the fingertips to press the buttons. With most trackballs, operators have to lift their finger, thumb or hand and reposition in on the ball to continue rolling, whereas a mouse would have to be lifted itself and re-positioned. Some trackballs have notably low friction, as well as being made of a dense material such as phenolic resin, so they can be spun to make them coast. The trackball's buttons may be in similar positions to those of a mouse, or configured to suit the user. Large trackballs are common on CAD workstations for easy precision. Before the advent of the touchpad, small trackballs were common on portable computers (such as the BlackBerry T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferranti Canada
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Can may refer to: Containers * Aluminum can * Drink can * Oil can * Steel and tin cans * Trash can * Petrol can * Metal can (other) Music * Can (band), West Germany, 1968 ** ''Can'' (album), 1979 * Can (South Korean band) Other * Can (name), Turkish and Circassian given name and surname * Can (verb) * Canning of food * River Can, Essex, UK * Canada * Tomato can (sports idiom) See also * CAN (other) * Cann (other) * Cans (other) * Kan (other) Kan or KAN may refer to: Places * Kan (river), a tributary of the Yenisey in Russia * Kan District of Iran * Kan, Kyrgyzstan, a village in Batken Region * Mallam Aminu Kano International Airport, Kano, Nigeria, IATA code * Kannapolis (Amtrak st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Engineering
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use. Electrical engineering is now divided into a wide range of different fields, including computer engineering, systems engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, photovoltaic cells, electronics, and optics and photonics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control, and ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kenyon Taylor
Maurice Kenyon Taylor (26 June 1908 – 29 June 1986) was an English electrical engineer and inventor, responsible for many diverse technological developments and inventions, producing over 70 patents during his career. He spent most of his career at Ferranti, first in Manchester, then Edinburgh and finally moving to Canada where he led development at their Toronto-area operations, Ferranti-Packard. Early life Taylor was born near Balloch, Scotland to English parents; the son of Maurice Grove Taylor. He was educated at Oundle Public school and passed the entrance exam to King's College, Cambridge, where he studied for a year before moving to Manchester University. Ferranti Manchester Kenyon Taylor came to the attention of Albert Hall who was the personal assistant of Sebastian Ziani de Ferranti of the Ferranti company Manchester and joined them as a lab boy in March 1931. For some time, Ferranti had been contracted by J P Coats of Paisley to develop a very high speed cotton doub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraph Media Group
Telegraph Media Group Limited (TMG; previously the Telegraph Group) is the proprietor of ''The Daily Telegraph'' and ''The Sunday Telegraph''. It is a subsidiary of Press Holdings. David and Frederick Barclay acquired the group on 30 July 2004, after months of intense bidding and lawsuits, from Hollinger Inc. of Toronto, Canada, the newspaper group controlled by the Canadian/American businessman Conrad Black. In 2015, TMG made an operating profit of £51 million. Profits before tax were £47m, and turnover for the 53 weeks up to 3 January 2016 was £319m, according to unaudited accounts leaked to ''The Guardian''. If these figures are accurate, then this was an increase from 2014 levels on both accounts. Telegraph Media Group operates as a multimedia news company. The holding publishes daily and weekly publications in printed and electronic versions, which provide news on politics, obituaries, sports, finance, lifestyle, travel, health, culture, technology, fashion and cars. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Input Device
In computing, an input device is a piece of equipment used to provide data and control signals to an information processing system, such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, cameras, joysticks, and microphones. Input devices can be categorized based on: * modality of input (e.g., mechanical motion, audio, visual, etc.) * whether the input is discrete (e.g., pressing of key) or continuous (e.g., a mouse's position, though digitized into a discrete quantity, is fast enough to be considered continuous) * the number of degrees of freedom involved (e.g., two-dimensional traditional mice, or three-dimensional navigators designed for CAD applications) Keyboard A keyboard is a human interface device which is represented as a layout of buttons. Each button, or key, can be used to either input an alphanumeric character to a computer, or to call upon a particular function of the computer. It acts as the main text ent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joystick
A joystick, sometimes called a flight stick, is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. A joystick, also known as the control column, is the principal control device in the cockpit of many civilian and military aircraft, either as a centre stick or side-stick. It often has supplementary switches to control various aspects of the aircraft's flight. Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer. A popular variation of the joystick used on modern video game consoles is the analog stick. Joysticks are also used for controlling machines such as cranes, trucks, underwater unmanned vehicles, wheelchairs, surveillance cameras, and zero turning radius lawn mowers. Miniature finger-operated joysticks have been adopted as input devices for smaller electronic equipment such as mobile phones. Aviation Joys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Computer
An analog computer or analogue computer is a type of computer that uses the continuous variation aspect of physical phenomena such as electrical, mechanical, or hydraulic quantities (''analog signals'') to model the problem being solved. In contrast, digital computers represent varying quantities symbolically and by discrete values of both time and amplitude (digital signals). Analog computers can have a very wide range of complexity. Slide rules and nomograms are the simplest, while naval gunfire control computers and large hybrid digital/analog computers were among the most complicated. Complex mechanisms for process control and protective relays used analog computation to perform control and protective functions. Analog computers were widely used in scientific and industrial applications even after the advent of digital computers, because at the time they were typically much faster, but they started to become obsolete as early as the 1950s and 1960s, although they rem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Navy
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service. From the middle decades of the 17th century, and through the 18th century, the Royal Navy vied with the Dutch Navy and later with the French Navy for maritime supremacy. From the mid 18th century, it was the world's most powerful navy until the Second World War. The Royal Navy played a key part in establishing and defending the British Empire, and four Imperial fortress colonies and a string of imperial bases and coaling stations secured the Royal Navy's ability to assert naval superiority globally. Owing to this historical prominence, it is common, even among non-Britons, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comprehensive Display System
The Comprehensive Display System (CDS) was a command, control, and coordination system of the British Royal Navy (RN) that worked with the detection/search Type 984 radar. The system was installed on a total of six ships starting in 1957. The US Navy purchased a prototype CDS and produced twenty of their own version, the Electronic Data System (EDS). These were used on a number of ships until 1968. A modified version, the Data Handling System, was used with the AMES Type 82 radar by the Royal Air Force, and US Air Force very nearly used it as well. The CDS allowed operators to assign objects on the radar display different IDs and combined them together onto a single display which allowed intercept officers to have a unified display of location, raid size, and altitude. The CDS made it easy for operators to vector friendly fighters onto intercept courses with unknown targets and later versions could automatically calculate the interception points. The basic idea of the CDS was ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a detection system that uses radio waves to determine the distance ('' ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds. Radar was developed secretly for military use by several countries in the period before and during World War II. A key development was the cavity magnetron in the United Kingdom, which allowed the creation of relatively small systems with sub-meter resolution. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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