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Micropolis (company)
Micropolis Corporation (styled as ''MICROPΩLIS'') was a disk drive company located in Chatsworth, California and founded in 1976. Micropolis initially manufactured high capacity (for the time) hard-sectored 5.25-inch floppy drives and controllers, later manufacturing hard drives using SCSI and ESDI interfaces. History Micropolis's first advance was to take the existing 48 tpi (tracks per inch) standard created by Shugart Associates, and double both the track density and track recording density to get four times the total storage on a 5.25-inch floppy in the "MetaFloppy" series with quad density (Drives '':1054'', '':1053'', and '':1043'') around 1980. Micropolis pioneered 100 tpi density because of the attraction of an exact 100 tracks to the inch. "Micropolis-compatible" 5.25-inch 77-track diskette drives were also manufactured by Tandon (TM100-3M and TM100-4M). Such drives were used in a number of computers like in a Vector Graphic S-100 bus computer, the Durango ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chatsworth, California
Chatsworth is a suburban neighborhood in the City of Los Angeles, California, in the San Fernando Valley. The area was home to Native Americans, some of whom left caves containing rock art. Chatsworth was explored and colonized by the Spanish beginning in the 18th century. The land was part of a Spanish land grant, Rancho Ex-Mission San Fernando, in the 19th century, and after the United States took over the land following the Mexican–American War, it was the largest such grant in California. Settlement and development followed. Chatsworth has seven public and eight private schools. There are large open-space and smaller recreational parks as well as a public library and a transportation center. Distinctive features are the former Chatsworth Reservoir and the Santa Susana Field Laboratory. The neighborhood has one of the lowest population densities in Los Angeles and a relatively high income level. Chatsworth is the home of the Iverson Movie Ranch, a 500-acre area which w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commodore 8050
The Commodore 8050, Commodore 8250, and Commodore SFD-1001 are 5¼-inch floppy disk drives manufactured by Commodore International, primarily for its 8-bit CBM and PET series of computers. The drives offered improved storage capacities over previous Commodore drive models. Specifications All three models utilize 5¼-inch double-density floppy disks with a track spacing of 100 tracks-per-inch, for a total of 77 logical tracks per side. Data is encoded using Commodore's proprietary group coded recording scheme. Soft sectoring is used for track alignment. Like most other Commodore disk drives, these drives utilize zone bit recording to maintain an average bit density across the entire disk. Formatted capacity is approximately 0.5 megabyte per side, or 1 megabyte (1,066,496 bytes) in 4166 blocks total. The 8050 is a single-sided drive, whereas the 8250 and SFD-1001 are dual-sided drives. Dual-sided drives can fully read and write to disks formatted by single-sided drives, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sumitomo Corporation
is one of the largest worldwide ''sogo shosha'' general trading companies, and is a diversified corporation. The company was incorporated in 1919 and is a member company of the Sumitomo Group. It is listed on three Japanese stock exchanges (Tokyo, Nagoya and Fukuoka) and is a constituent of the TOPIX and Nikkei 225 stock indices. Today, the company is one of the top three '' sōgō shōsha'' companies in the world. History The Sumitomo Group, of which Sumitomo Corporation is a key member, dates to the 17th century establishment of a book and medicine shop in Kyoto by Masatomo Sumitomo. Sumitomo's brother-in-law Riemon Soga developed a technology to extract silver from copper, and Soga's son (who married Sumitomo's daughter) Tomomochi Sumitomo expanded this smelting business to Osaka. From this start, the Sumitomo family expanded its business into copper mining (the Besshi copper mine), followed by textiles, sugar and medicine trading. The Sumitomo family was close to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video On Demand
Video on demand (VOD) is a media distribution system that allows users to access videos without a traditional video playback device and the constraints of a typical static broadcasting schedule. In the 20th century, broadcasting in the form of over-the-air programming was the most common form of media distribution. As Internet and IPTV technologies continued to develop in the 1990s, consumers began to gravitate towards non-traditional modes of content consumption, which culminated in the arrival of VOD on televisions and personal computers. Unlike broadcast television, VOD systems initially required each user to have an Internet connection with considerable bandwidth to access each system's content. In 2000, the Fraunhofer Institute IIS developed the JPEG2000 codec, which enabled the distribution of movies via Digital Cinema Packages. This technology has since expanded its services from feature-film productions to include broadcast television programmes and has led to lower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peripheral Technology Group
A peripheral or peripheral device is an auxiliary device used to put information into and get information out of a computer. The term ''peripheral device'' refers to all hardware components that are attached to a computer and are controlled by the computer system, but they are not the core components of the computer, such as the CPU or power supply unit. In other words, peripherals can also be defined as devices that can be easily removed and plugged into a computer system. Several categories of peripheral devices may be identified, based on their relationship with the computer: *An ''input device'' sends data or instructions to the computer, such as a mouse, keyboard, graphics tablet, image scanner, barcode reader, game controller, light pen, light gun, microphone and webcam; *An ''output device'' provides output data from the computer, such as a computer monitor, projector, printer, headphones and computer speaker; *An ''input/output device'' performs both input and output ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temasek Holdings
Temasek Holdings (Private) Limited, or simply Temasek, is a Singaporean state holding company owned by the Government of Singapore. Incorporated on 25 June 1974, Temasek owns and manages a total of US$496.59 billion (S$671 billion) in assets under management (AUM) as of December 2022. Its net portfolio is US$287 billion (S$403 billion) as of 2022, with S$37 billion divested and S$61 billion invested during the year. Its one-year total shareholder return (TSR) was 5.8%, with longer term 10 and 20-year TSRs at 7% and 8% respectively, compounded annually. Its TSR since inception was 14%, compounded over 48 years. Headquartered in Singapore, it has 12 offices in 8 countries around the world, including in Beijing, Hanoi, Mumbai, Shanghai, Shenzhen; and London, Brussels, New York, San Francisco, Washington, D.C. and Mexico City outside Asia. It is an active shareholder and investor, with four key structural trends guiding its long term portfolio construction – Digitisation, Sus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Singapore Technology
Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, bordering the Strait of Malacca to the west, the Singapore Strait to the south, the South China Sea to the east, and the Straits of Johor to the north. The country's territory is composed of one main island, 63 satellite islands and islets, and one outlying islet; the combined area of these has increased by 25% since the country's independence as a result of extensive land reclamation projects. It has the third highest population density in the world. With a multicultural population and recognising the need to respect cultural identities of the major ethnic groups within the nation, Singapore has four official languages: English, Malay, Mandarin, and Tamil. English is the lingua franca and numerous public services are available only in En ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alan Shugart
Alan Field Shugart (September 27, 1930 – December 12, 2006) was an American engineer, entrepreneur and business executive whose career defined the modern computer disk drive industry. Personal history Born in Los Angeles, he graduated from the University of Redlands, receiving a degree in engineering physics. Shugart was the father of three children: Joanne Shugart (1951-1954), Christopher D. Shugart (b. 1953) and Teri L.K. Shugart (b. 1955). Shugart was married to Esther Marrs (née Bell), the mother of his three children, from 1951 until 1973. He was married to Rita Shugart (née Kennedy) from 1981 until his death. Shugart died on December 12, 2006 in Monterey, California of complications from heart surgery he had undergone six weeks earlier. Career He began his career in 1951 as a field engineer at IBM. In 1955 he transferred to the IBM San Jose laboratory where he worked on the IBM 305 RAMAC. He rose through a series of increasingly important positions to become ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seagate Technology
Seagate Technology Holdings plc is an American data storage company. It was incorporated in 1978 as Shugart Technology and commenced business in 1979. Since 2010, the company has been incorporated in Dublin, Ireland, with operational headquarters in Fremont, California, United States. Seagate developed the first 5.25-inch hard disk drive (HDD), the 5-megabyte ST-506, in 1980. They were a major supplier in the microcomputer market during the 1980s, especially after the introduction of the IBM XT in 1983. Much of their growth has come through their acquisition of competitors. In 1989, Seagate acquired Control Data Corporation's Imprimis division, the makers of CDC's HDD products. Seagate acquired Conner Peripherals in 1996, Maxtor in 2006, and Samsung's HDD business in 2011. Today, Seagate, along with its competitor Western Digital, dominates the HDD market. History Founding as Shugart Technology Seagate Technology (then called Shugart Technology) was incorporated on No ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backwards Compatibility
Backward compatibility (sometimes known as backwards compatibility) is a property of an operating system, product, or technology that allows for interoperability with an older legacy system, or with input designed for such a system, especially in telecommunications and computing. Modifying a system in a way that does not allow backward compatibility is sometimes called " breaking" backward compatibility. A complementary concept is forward compatibility. A design that is forward-compatible usually has a roadmap for compatibility with future standards and products. A related term from programming jargon is hysterical reasons or hysterical raisins (near-homophones for "historical reasons"), as the purpose of some software features may be solely to support older hardware or software versions. Usage In hardware A simple example of both backward and forward compatibility is the introduction of FM radio in stereo. FM radio was initially mono, with only one audio channel represented ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
48 tpi
Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads. Magnetic storage media, primarily hard disks, are widely used to store computer data as well as audio and video signals. In the field of computing, the term ''magnetic storage'' is preferred and in the field of audio and video production, the term ''magnetic recording'' is more commonly used. The distinction is less technical and more a matter of preference. Other examples of magnetic storage media include floppy disks, magnetic tape, and magnetic stripes on credit cards. History Magnetic storage in the form of wire recording—audio recording on a wire—was publicized by Oberlin Smith in the Sept 8, 1888 issue of ''Electrical World''. Smith had previously filed a patent in September, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
96 tpi
Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads. Magnetic storage media, primarily hard disks, are widely used to store computer data as well as audio and video signals. In the field of computing, the term ''magnetic storage'' is preferred and in the field of audio and video production, the term ''magnetic recording'' is more commonly used. The distinction is less technical and more a matter of preference. Other examples of magnetic storage media include floppy disks, magnetic tape, and magnetic stripes on credit cards. History Magnetic storage in the form of wire recording—audio recording on a wire—was publicized by Oberlin Smith in the Sept 8, 1888 issue of ''Electrical World''. Smith had previously filed a patent in September, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
