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Pravetz Computers
Pravetz computers (in Bulgarian shortly: Правец) are the Bulgarian personal computers produced from 1979 that were widely used in scientific organizations and schools until the late 1990s, and are still in use in some schools. Pravets are actually the first personal computers in Bulgaria, although before that, various types of large computer-computing systems were used, the size of rooms (60-70), as well as even lamp computers before that. The name of the Pravet computers specifies that these are Personal Computers "made" (in Bulgarian language: правя, ''pravja'') in Bulgaria. They were manufactured in the town of Pravetz, with some components and software being produced in other towns as Sofia, Plovdiv, Stara Zagora and other Bulgarian cities. Pravetz computers are still in use in some schools for beginner students in computing because they are adapted in manufacturing for educational purposes. Bulgaria was the leading manufacturer, with its leading trademark Prave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public Company
A public company is a company whose ownership is organized via shares of stock which are intended to be freely traded on a stock exchange or in over-the-counter markets. A public (publicly traded) company can be listed on a stock exchange (listed company), which facilitates the trade of shares, or not (unlisted public company). In some jurisdictions, public companies over a certain size must be listed on an exchange. In most cases, public companies are ''private'' enterprises in the ''private'' sector, and "public" emphasizes their reporting and trading on the public markets. Public companies are formed within the legal systems of particular states, and therefore have associations and formal designations which are distinct and separate in the polity in which they reside. In the United States, for example, a public company is usually a type of corporation (though a corporation need not be a public company), in the United Kingdom it is usually a public limited company (plc), i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulgarian Academy Of Sciences
The Bulgarian Academy of Sciences (abbreviated BAS; bg, Българска академия на науките, ''Balgarska akademiya na naukite'', abbreviated ''БАН'') is the National Academy of Bulgaria, established in 1869. The Academy, with headquarters in Sofia, is autonomous and consists of a Society of Academicians, Correspondent Members and Foreign Members. It publishes and circulates different scientific works, encyclopaedias, dictionaries and journals, and runs its own publishing house. The activities are distributed in three main branches: ''Natural, mathematical and engineering sciences''; ''Biological, medical and agrarian sciences'' and ''Social sciences, humanities and art''. They are structured in 42 independent scientific institutes, and a dozen of laboratories and other sections. Julian Revalski has been the president of the BAS since 2016. As of 2021, its budget was 117,8 million leva (€60,2 million). History As Bulgaria was part of the Ottoman E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CP/M
CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/ 85-based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to single-tasking on 8-bit processors and no more than 64 kilobytes of memory, later versions of CP/M added multi-user variations and were migrated to 16-bit processors. The combination of CP/M and S-100 bus computers became an early standard in the microcomputer industry. This computer platform was widely used in business through the late 1970s and into the mid-1980s. CP/M increased the market size for both hardware and software by greatly reducing the amount of programming required to install an application on a new manufacturer's computer. An important driver of software innovation was the advent of (comparatively) low-cost microcomputers running CP/M, as independent programmers and hackers bought them and shared their crea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pravetz 8М
Pravets or Pravetz ( bg, Правец, also transliterated as Pravec, ) is a town in Pravets Municipality in central western Bulgaria, located approximately from the capital Sofia. Pravets is home town of Pravetz computers. Pravets has a population of 4,512 people. Mountains surround it, which allows for a mild climate with rare winds. In the outskirts there is an artificial lake used for fishing and recreation. The town is the birthplace of Bulgaria's longtime communist President Todor Zhivkov. The first microprocessor factory in Bulgaria established in Pravets. The computers produced there, which were among the first in Bulgaria, were named Pravetz. Today, the town is most famous for its Computers and technology systems high school and the RIU golf resort complex. There is also a language high school by the name of Aleko Konstantinov. It prepares many students who continue their undergraduate education in Bulgaria, England, the US, Germany, and France. The Professional Comput ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Keyboard
A computer keyboard is a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter-style keyboards have been the main input method for computers since the 1970s, supplemented by the computer mouse since the 1980s. Keyboard keys (buttons) typically have a set of characters engraved or printed on them, and each press of a key typically corresponds to a single written symbol. However, producing some symbols may require pressing and holding several keys simultaneously or in sequence. While most keys produce characters (letters, numbers or symbols), other keys (such as the escape key) can prompt the computer to execute system commands. In a modern computer, the interpretation of key presses is generally left to the software: the information sent to the computer, the scan code, tells it only whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BASIC
BASIC (Beginners' All-purpose Symbolic Instruction Code) is a family of general-purpose, high-level programming languages designed for ease of use. The original version was created by John G. Kemeny and Thomas E. Kurtz at Dartmouth College in 1963. They wanted to enable students in non-scientific fields to use computers. At the time, nearly all computers required writing custom software, which only scientists and mathematicians tended to learn. In addition to the program language, Kemeny and Kurtz developed the Dartmouth Time Sharing System (DTSS), which allowed multiple users to edit and run BASIC programs simultaneously on remote terminals. This general model became very popular on minicomputer systems like the PDP-11 and Data General Nova in the late 1960s and early 1970s. Hewlett-Packard produced an entire computer line for this method of operation, introducing the HP2000 series in the late 1960s and continuing sales into the 1980s. Many early video games trace their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pravetz 82
The Pravetz 82 bg, (Правец 82), previously IMKO-2 ( bg, ИМКО-2) was the first serially manufactured personal computer in Bulgaria and first in the Pravetz series 8 range of computers. It was produced in the eponymous town of Pravetz. As the other computers in the series, it is an Apple II clone. History After the success of the limited series of the IMKO-1 throughout various scientific institutions in Bulgaria, it's developer Ivan Marangozov initiated development of a new model aimed for serial production. The IMKO-2 prototype development While IMKO-1 was based on the Apple II personal computer, the next prototype IMKO-2 was developed as a clone of Apple II Plus, although the keyboard design stayed close to the original Apple II model, rather than the Plus keyboard. At the time, Apple II clones, clones of the Apple II series were already widespread around the world. The abbreviation IMKO stands for "Individual Micro Computer" ( bg, Индивидуален мик ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MOS Technology 6502
The MOS Technology 6502 (typically pronounced "sixty-five-oh-two" or "six-five-oh-two") William Mensch and the moderator both pronounce the 6502 microprocessor as ''"sixty-five-oh-two"''. is an 8-bit microprocessor that was designed by a small team led by Chuck Peddle for MOS Technology. The design team had formerly worked at Motorola on the Motorola 6800 project; the 6502 is essentially a simplified, less expensive and faster version of that design. When it was introduced in 1975, the 6502 was the least expensive microprocessor on the market by a considerable margin. It initially sold for less than one-sixth the cost of competing designs from larger companies, such as the 6800 or Intel 8080. Its introduction caused rapid decreases in pricing across the entire processor market. Along with the Zilog Z80, it sparked a series of projects that resulted in the home computer revolution of the early 1980s. Popular video game consoles and home computers of the 1980s and early 1990s, su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple Inc
Apple Inc. is an American multinational technology company headquartered in Cupertino, California, United States. Apple is the largest technology company by revenue (totaling in 2021) and, as of June 2022, is the world's biggest company by market capitalization, the fourth-largest personal computer vendor by unit sales and second-largest mobile phone manufacturer. It is one of the Big Five American information technology companies, alongside Alphabet, Amazon, Meta, and Microsoft. Apple was founded as Apple Computer Company on April 1, 1976, by Steve Wozniak, Steve Jobs and Ronald Wayne to develop and sell Wozniak's Apple I personal computer. It was incorporated by Jobs and Wozniak as Apple Computer, Inc. in 1977 and the company's next computer, the Apple II, became a best seller and one of the first mass-produced microcomputers. Apple went public in 1980 to instant financial success. The company developed computers featuring innovative graphical user inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyrillic
, bg, кирилица , mk, кирилица , russian: кириллица , sr, ћирилица, uk, кирилиця , fam1 = Egyptian hieroglyphs , fam2 = Proto-Sinaitic , fam3 = Phoenician , fam4 = Greek script augmented by Glagolitic , sisters = , children = Old Permic script , unicode = , iso15924 = Cyrl , iso15924 note = Cyrs (Old Church Slavonic variant) , sample = Romanian Traditional Cyrillic - Lord's Prayer text.png , caption = 1780s Romanian text (Lord's Prayer), written with the Cyrillic script The Cyrillic script ( ), Slavonic script or the Slavic script, is a writing system used for various languages across Eurasia. It is the designated national script in various Slavic, Turkic, Mongolic, Uralic, Caucasian and Iranic-speaking countries in Southeastern Europe, Eastern Europe, the Caucasus, Central Asia, North Asia, and East Asia. , around 250 million people in Eurasia use Cyrillic a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple II
The Apple II (stylized as ) is an 8-bit home computer and one of the world's first highly successful mass-produced microcomputer products. It was designed primarily by Steve Wozniak; Jerry Manock developed the design of Apple II's foam-molded plastic case, Rod Holt developed the switching power supply, while Steve Jobs's role in the design of the computer was limited to overseeing Jerry Manock's work on the plastic case. It was introduced by Jobs and Wozniak at the 1977 West Coast Computer Faire, and marks Apple's first launch of a personal computer aimed at a consumer market—branded toward American households rather than businessmen or computer hobbyists. ''Byte'' magazine referred to the Apple II, Commodore PET 2001, and TRS-80 as the "1977 Trinity". As the Apple II had the defining feature of being able to display color graphics, the Apple logo was redesigned to have a spectrum of colors. The Apple II is the first model in the Apple II series, followed by Apple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tangerine Computer Systems
Tangerine Computer Systems was a British microcomputer company founded in 1979 by Dr. Paul Johnson, Mark Rainer and Nigel Penton Tilbury in St. Ives, Cambridgeshire. The very first product was the successful TAN1648 VDU kit which received much acclaim in the technical press. The home computer market was beginning to move, albeit slowly, and it was essential to establish a presence. Development and expansion was imperative. It was decided that the latter two partners would relinquish their involvement in order to focus on their consultancy work. Barry Muncaster became involved operationally and the company moved to new premises in Ely, Cambridgeshire. The company was later renamed, and was known as Oric Products International. Early years: Microtan 65 Tangerine produced one of the first 6502-based kit computers, the Microtan 65. It had a 3 U form factor, a small amount of memory (RAM), a video character generator and UHF modulator for use with a TV set, and a simple latc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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