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Sealevel Systems
Sealevel Systems, Inc. is a privately held manufacturer headquartered in Liberty, South Carolina, which develops computer circuit I/O boards. Company overview Sealevel Systems was founded by Tom O’Hanlan and his wife Susan, in 1986. In 1991 the company released a dual port serial card that allowed users to set its I/O addresses to any two COM ports. In 1994, Sealevel developed the RS-485 auto-enabled circuit. The circuit eliminated the need to control the RS-485 transceiver-enable signal via software and removed the risk of communications error due to bus communications. In 1997, O’Hanlan was granted a patent for a communication device that transmitted asynchronous formatted data synchronously. The company produced the communications card used for positioning the Space Shuttle's robotic arm in 2002. Tom O’Hanlan and technical author Jon Titus co-authored a book, ''The Digital I/O Handbook'', in 2004. In 2005, Sealevel Systems released the industry's first RoHS-complia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty, South Carolina
Liberty is a city in Pickens County, South Carolina, United States. It is part of the Greenville– Mauldin– Easley Metropolitan Statistical Area. The city was chartered on March 2, 1876. Toponymy How exactly Liberty got its name has been a source of debate over the years. There are no real historical accounts of why Liberty was given the name it was. The most popular—though probably mythical—story regarding the reason the area was named Liberty was put forth by Mrs. Annie Craig in 1936: "At the close of the Revolutionary war a religious meeting was being held at a church close to a spring near the present town of Liberty when the word came that Cornwallis had surrendered and the colonies had gained their independence. This church was named Liberty and it and the spring were located just beyond where the cemetery is now located, hence the name Liberty." Some have claimed that Liberty was once named Salubrity Springs, but was renamed Liberty in the late 19th centu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Carolina
)''Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = Greenville (combined and metro) Columbia (urban) , BorderingStates = Georgia, North Carolina , OfficialLang = English , population_demonym = South Carolinian , Governor = , Lieutenant Governor = , Legislature = General Assembly , Upperhouse = Senate , Lowerhouse = House of Representatives , Judiciary = South Carolina Supreme Court , Senators = , Representative = 6 Republicans1 Democrat , postal_code = SC , TradAbbreviation = S.C. , area_rank = 40th , area_total_sq_mi = 32,020 , area_total_km2 = 82,932 , area_land_sq_mi = 30,109 , area_land_km2 = 77,982 , area_water_sq_mi = 1,911 , area_water_km2 = 4,949 , area_water_percent = 6 , population_rank = 23rd , population_as_of = 2022 , 2010Pop = 5282634 , population ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
COM (hardware Interface)
COM (communication port) is the original, yet still common, name of the serial port interface on PC-compatible computers. It can refer not only to physical ports, but also to emulated ports, such as ports created by Bluetooth or USB adapters. History The name for the COM port started with the original IBM PC. IBM had called the four well-defined communication RS-232 ports the "COM" ports, starting from COM1 through COM4. In BASICA and PC DOS you can open these ports as "COM1:" through "COM4:", and all PC compatibles using MSDOS used the same denotation. Most PC-compatible computers in the 1980s and 1990s had one or two COM ports. By 2007, most computers shipped with only one or no physical COM ports. Today few consumer-grade PC-compatible computers include COM ports, though some of them do still include a COM header on the motherboard. After the RS-232 COM port was removed from most consumer-grade computers, an external USB-to-UART serial adapter cable was used to compens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Shuttle
The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program name was Space Transportation System (STS), taken from a 1969 plan for a system of reusable spacecraft where it was the only item funded for development. The first ( STS-1) of four orbital test flights occurred in 1981, leading to operational flights (STS-5) beginning in 1982. Five complete Space Shuttle orbiter vehicles were built and flown on a total of 135 missions from 1981 to 2011. They launched from the Kennedy Space Center (KSC) in Florida. Operational missions launched numerous satellites, interplanetary probes, and the Hubble Space Telescope (HST), conducted science experiments in orbit, participated in the Shuttle-''Mir'' program with Russia, and participated in construction and servicing of the International Space Station (ISS). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AN/PRC-117F
The AN/PRC-117 translates to "Army/Navy, Portable, Radio, Communication". It is a man-portable, tactical software-defined combat-net radio, manufactured by Harris Corporation, in two different versions: * AN/PRC-117F Falcon II MBMMR (Multiband Multimission Manpack Radio), also referred to as AN/PRC-117F-MP, covering the 30-512 MHz frequency range, provided without an internal GPS (optionally an external commercial GPS can be connected, or a GPS SAASM as a PLGR (Precision Lightweight GPS Receiver) or a DAGR (Defense Advanced GPS Receiver); * AN/PRC-117G Falcon III MNMR (Multiband Networking Manpack Radio), also referred to as AN/PRC-117G-MP, covering the 30-2000 MHz frequency range, and provided with internal SAASM GPS (optionally an external commercial GPS can be connected). Both radios have NSA certification for the transmission of voice and data traffic up to the Top Secret level. The designation AN/PRC signifies "Army Navy / Portable Radio Communications" and is b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephonic or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was lau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Air Systems Command
The Naval Air Systems Command (NAVAIR) provides materiel support for aircraft and airborne weapon systems for the United States Navy. It is one of the Echelon II Navy systems commands (SYSCOM), and was established in 1966 as the successor to the Navy's Bureau of Naval Weapons. NAVAIR is headquartered in Naval Air Station Patuxent River in St. Mary's County, Maryland, with military and civilian personnel stationed at eight locations across the continental United States and one site overseas. The current commander as of September 2021 is Vice Admiral Carl P. Chebi, USN. The vice commander is Leslie Taylor, SES. The deputy commander is Mr. Theodore J. Short Jr., SES. The Command Master Chief is CMDCM Todd A. Anselm, USN. NAVAIR's mission is to provide full life-cycle support of naval aviation aircraft, weapons and systems operated by Sailors and Marines. This support includes research, design, development and systems engineering, acquisition, test and evaluation, training faciliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Companies Based In South Carolina
A company, abbreviated as co., is a legal entity representing an association of people, whether natural, legal or a mixture of both, with a specific objective. Company members share a common purpose and unite to achieve specific, declared goals. Companies take various forms, such as: * voluntary associations, which may include nonprofit organizations * business entities, whose aim is generating profit * financial entities and banks * programs or educational institutions A company can be created as a legal person so that the company itself has limited liability as members perform or fail to discharge their duty according to the publicly declared incorporation, or published policy. When a company closes, it may need to be liquidated to avoid further legal obligations. Companies may associate and collectively register themselves as new companies; the resulting entities are often known as corporate groups. Meanings and definitions A company can be defined as an "artificial per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manufacturing Companies Based In South Carolina
Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of secondary sector of the economy. The term may refer to a range of human activity, from handicraft to high-tech, but it is most commonly applied to industrial design, in which raw materials from the primary sector are transformed into finished goods on a large scale. Such goods may be sold to other manufacturers for the production of other more complex products (such as aircraft, household appliances, furniture, sports equipment or automobiles), or distributed via the tertiary industry to end users and consumers (usually through wholesalers, who in turn sell to retailers, who then sell them to individual customers). Manufacturing engineering is the field of engineering that designs and optimizes the manufacturing process, or the steps through which raw materials are transformed into a final product. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Companies Established In 1986
A company, abbreviated as co., is a legal entity representing an association of people, whether natural, legal or a mixture of both, with a specific objective. Company members share a common purpose and unite to achieve specific, declared goals. Companies take various forms, such as: * voluntary associations, which may include nonprofit organizations * business entities, whose aim is generating profit * financial entities and banks * programs or educational institutions A company can be created as a legal person so that the company itself has limited liability as members perform or fail to discharge their duty according to the publicly declared incorporation, or published policy. When a company closes, it may need to be liquidated to avoid further legal obligations. Companies may associate and collectively register themselves as new companies; the resulting entities are often known as corporate groups. Meanings and definitions A company can be defined as an "artificial per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Companies Based In South Carolina
Software is a set of computer programs and associated documentation and data. This is in contrast to hardware, from which the system is built and which actually performs the work. At the lowest programming level, executable code consists of machine language instructions supported by an individual processor—typically a central processing unit (CPU) or a graphics processing unit (GPU). Machine language consists of groups of binary values signifying processor instructions that change the state of the computer from its preceding state. For example, an instruction may change the value stored in a particular storage location in the computer—an effect that is not directly observable to the user. An instruction may also invoke one of many input or output operations, for example displaying some text on a computer screen; causing state changes which should be visible to the user. The processor executes the instructions in the order they are provided, unless it is instru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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