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Group coded recording

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In computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for magnetic media. [1]

90 relations: Addison-Wesley, American National Standards Institute, Apple DOS, Apple FileWare, Apple II, Apple Inc., Apple Lisa, Apple Pascal, Apple ProDOS, Areal density (computer storage), Barcode, Bit numbering, Block code, Brother Industries, Byte (magazine), Central Point Software, Chuck Peddle, Commodore 4040, Commodore International, Computer History Museum, Computer science, Computerworld, Cyclic redundancy check, Daisy chain (electrical engineering), Differential Manchester encoding, Direct current, Disk II, Durango F-85, Eight-to-fourteen modulation, Error correction code, Exclusive or, File Allocation Table, Floppy disk, Floppy disk format, Floppy disk variants, Floppy-disk controller, Focal Press, Franzis Verlag, Group code, Group coded recording, Hard disk drive, Honeywell, IBM, IBM Journal of Research and Development, IBM Personal Computer, IEEE Spectrum, IEEE Transactions on Magnetics, InfoWorld, Institute of Electrical and Electronics Engineers, Integrated Woz Machine, ..., International Committee for Information Technology Standards, Internationale Funkausstellung Berlin, Longitudinal redundancy check, Macintosh, Magnetic storage, Magnetic tape, Magnetic tape data storage, Mainframe computer, Manchester code, McGraw-Hill Education, Microcomputer, Micropolis (company), Modified Frequency Modulation, Nanyang Technological University, NEC, Nibble, Non-return-to-zero, Original equipment manufacturer, Parity bit, PerkinElmer, Pocket computer, Polynomial, Quality Software, Qualstar, Reel-to-reel audio tape recording, Run-length limited, Self-clocking signal, Sharp Corporation, Sharp PC-1600, Sirius Systems Technology, Steve Wozniak, The Transactor, UNIVAC, Victor Technology, Western Digital, Western Digital FD1771, Zone bit recording, 4B5B, 8b/10b encoding, 9 track tape. Expand index (40 more) »

Addison-Wesley

Addison-Wesley is a publisher of textbooks and computer literature.

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American National Standards Institute

The American National Standards Institute (ANSI) is a private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States.

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Apple DOS

Apple DOS is the family of disk operating systems for the Apple II series of microcomputers from late 1978 through early 1983.

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Apple FileWare

FileWare floppy disk drives and diskettes were designed by Apple Computer as a higher-performance alternative to the Disk II and Disk III floppy systems used on the Apple II and Apple III personal computers.

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Apple II

The Apple II (stylized as Apple.

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Apple Inc.

Apple Inc. is an American multinational technology company headquartered in Cupertino, California, that designs, develops, and sells consumer electronics, computer software, and online services.

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Apple Lisa

The Apple Lisa is a desktop computer developed by Apple, released on January 19, 1983.

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Apple Pascal

Apple Pascal is a language and operating system based on the UCSD Pascal system.

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Apple ProDOS

ProDOS is the name of two similar operating systems for the Apple II series of personal computers.

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Areal density (computer storage)

Areal density is a measure of the quantity of information bits that can be stored on a given length of track, area of surface, or in a given volume of a computer storage medium.

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Barcode

A barcode (also bar code) is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode.

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Bit numbering

In computing, bit numbering (or sometimes bit endianness) is the convention used to identify the bit positions in a binary number or a container for such a value.

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Block code

In coding theory, a block code is any member of the large and important family of error-correcting codes that encode data in blocks.

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Brother Industries

is a Japanese multinational electronics and electrical equipment company headquartered in Nagoya, Japan.

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Byte (magazine)

Byte was an American microcomputer magazine, influential in the late 1970s and throughout the 1980s because of its wide-ranging editorial coverage.

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Central Point Software

Central Point Software, Inc. (CP, CPS, Central Point) was a leading software utilities maker for the PC market, supplying utilities software for the DOS and Microsoft Windows markets.

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Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

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Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

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Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

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Christmas traditions

Christmas traditions vary from country to country.

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Chuck Peddle

Charles Ingerham Peddle (born 1937) is an American electrical engineer best known as the main designer of the MOS Technology 6502 microprocessor, as well as the KIM-1 SBC (single-board computer) and its successor the Commodore PET PC (personal computer), both based on the 6502.

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Commodore 4040

The Commodore 4040 is the replacement for the previous models 2040 (USA) and 3040 (Europe).

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Commodore International

Commodore International (or Commodore International Limited) was an American home computer and electronics manufacturer founded by Jack Tramiel.

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Computer History Museum

The Computer History Museum (CHM) is a museum established in 1996 in Mountain View, California, US.

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Computer science

Computer science deals with the theoretical foundations of information and computation, together with practical techniques for the implementation and application of these foundations.

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Computerworld

Computerworld is a publication website and digital magazine for information technology (IT) and business technology professionals.

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Cyclic redundancy check

A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.

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Daisy chain (electrical engineering)

In electrical and electronic engineering a daisy chain is a wiring scheme in which multiple devices are wired together in sequence or in a ring.

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Differential Manchester encoding

Differential Manchester encoding is a line code in which data and clock signals are combined to form a single 2-level self-synchronizing data stream.

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Direct current

Direct current (DC) is the unidirectional flow of electric charge.

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Disk II

The Disk II Floppy Disk Subsystem, often rendered as Disk.

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Durango F-85

The Durango F-85 was an early personal computer introduced in September 1978 by Durango Systems Corporation, a company started in 1977 by George E. Comstock, John M. Scandalios and Charles L. Waggoner, all formerly of Diablo Systems.

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Eight-to-fourteen modulation

Eight-to-fourteen modulation (EFM) is a data encoding technique – formally, a line code – used by compact discs (CD), laserdiscs (LD) and pre-Hi-MD MiniDiscs.

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Error correction code

In computing, telecommunication, information theory, and coding theory, an error correction code, sometimes error correcting code, (ECC) is used for controlling errors in data over unreliable or noisy communication channels.

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Exclusive or

Exclusive or or exclusive disjunction is a logical operation that outputs true only when inputs differ (one is true, the other is false).

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File Allocation Table

File Allocation Table (FAT) is a computer file system architecture and a family of industry-standard file systems utilizing it.

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Floppy disk

A floppy disk, also called a floppy, diskette, or just disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles.

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Floppy disk format

Floppy disk format and density refer to the logical and physical layout of data stored on a floppy disk.

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Floppy disk variants

The floppy disk is a ubiquitous data storage and transfer device from the mid-1970s well into the 2000s.

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Floppy-disk controller

A floppy-disk controller (FDC) is a special-purpose chip and associated disk controller circuitry that directs and controls reading from and writing to a computer's floppy disk drive (FDD).

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Focal Press

Focal Press is a publisher of media technology books and it is an imprint of Taylor & Francis.

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Franzis Verlag

The Franzis Verlag GmbH is a German publisher based in Haar, Germany and part of the WEKA Mediengruppe.

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Group code

In coding theory, group codes are a type of code.

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Group coded recording

In computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for magnetic media.

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Hard disk drive

A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.

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Honeywell

Honeywell International Inc. is an American multinational conglomerate company that produces a variety of commercial and consumer products, engineering services and aerospace systems for a wide variety of customers, from private consumers to major corporations and governments.

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IBM

The International Business Machines Corporation (IBM) is an American multinational technology company headquartered in Armonk, New York, United States, with operations in over 170 countries.

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IBM Journal of Research and Development

IBM Journal of Research and Development is a peer-reviewed bimonthly scientific journal covering research on information systems.

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IBM Personal Computer

The IBM Personal Computer, commonly known as the IBM PC, is the original version and progenitor of the IBM PC compatible hardware platform.

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IEEE Spectrum

IEEE Spectrum is a magazine edited by the Institute of Electrical and Electronics Engineers.

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IEEE Transactions on Magnetics

IEEE Transactions on Magnetics is a monthly peer-reviewed scientific journal that covers the basic physics of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

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InfoWorld

InfoWorld (formerly The Intelligent Machines Journal) is an information technology media business.

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Institute of Electrical and Electronics Engineers

The Institute of Electrical and Electronics Engineers (IEEE) is a professional association with its corporate office in New York City and its operations center in Piscataway, New Jersey.

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Integrated Woz Machine

The Integrated Woz Machine (or IWM for short) is a single-chip version of the floppy disk controller for the Apple II.

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International Committee for Information Technology Standards

The InterNational Committee for Information Technology Standards (INCITS), (pronounced "insights"), is an ANSI-accredited standards development organization composed of Information technology developers.

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Internationale Funkausstellung Berlin

The IFA or Internationale Funkausstellung Berlin (International radio exhibition Berlin, a.k.a. 'Berlin Radio Show') is one of the oldest industrial exhibitions in Germany.

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Longitudinal redundancy check

In telecommunication, a longitudinal redundancy check (LRC), or horizontal redundancy check, is a form of redundancy check that is applied independently to each of a parallel group of bit streams.

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Macintosh

The Macintosh (pronounced as; branded as Mac since 1998) is a family of personal computers designed, manufactured, and sold by Apple Inc. since January 1984.

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Magnetic storage

Magnetic storage or magnetic recording is the storage of data on a magnetized medium.

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Magnetic tape

Magnetic tape is a medium for magnetic recording, made of a thin, magnetizable coating on a long, narrow strip of plastic film.

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Magnetic tape data storage

Magnetic tape data storage is a system for storing digital information on magnetic tape using digital recording.

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Mainframe computer

Mainframe computers (colloquially referred to as "big iron") are computers used primarily by large organizations for critical applications; bulk data processing, such as census, industry and consumer statistics, enterprise resource planning; and transaction processing.

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Manchester code

In telecommunication and data storage, Manchester code (also known as phase encoding, or PE) is a line code in which the encoding of each data bit is either low then high, or high then low, for equal time.

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McGraw-Hill Education

McGraw-Hill Education (MHE) is a learning science company and one of the "big three" educational publishers that provides customized educational content, software, and services for pre-K through postgraduate education.

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Microcomputer

A microcomputer is a small, relatively inexpensive computer with a microprocessor as its central processing unit (CPU).

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Micropolis (company)

Micropolis Corporation (styled as MICROPΩLIS) was a disk drive company located in Chatsworth, California and founded in 1976.

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Modified Frequency Modulation

Modified Frequency Modulation, commonly MFM, is a run-length limited (RLL) coding scheme used to encode the actual data-bits on most floppy disks.

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Nanyang Technological University

The Nanyang Technological University (Abbreviation: NTU) is an autonomous research university in Singapore.

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NEC

is a Japanese multinational provider of information technology (IT) services and products, headquartered in Minato, Tokyo, Japan.

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New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

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New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

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New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

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Nibble

In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.

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Non-return-to-zero

In telecommunication, a non-return-to-zero (NRZ) line code is a binary code in which ones are represented by one significant condition, usually a positive voltage, while zeros are represented by some other significant condition, usually a negative voltage, with no other neutral or rest condition.

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Original equipment manufacturer

An Original Equipment Manufacturer (OEM) is a company that produces parts and equipment that may be marketed by another manufacturer.

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Parity bit

A parity bit, or check bit, is a bit added to a string of binary code to ensure that the total number of 1-bits in the string is even or odd.

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PerkinElmer

PerkinElmer, Inc., is an American multinational corporation focused in the business areas of human and environmental health, including: environmental analysis, food and consumer product safety, medical imaging, drug discovery, diagnostics, biotechnology, industrial applications, and life science research.

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Pocket computer

A pocket computer was a 1980s-era user programmable calculator-sized computer that had fewer screen lines, and often fewer characters per line, than the Pocket-sized computers introduced beginning in 1989.

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Polynomial

In mathematics, a polynomial is an expression consisting of variables (also called indeterminates) and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.

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Quality Software

Quality Software is a defunct software design company that published games for Apple II and Atari 800 computers in the late 1970s and early 1980s.

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Qualstar

Qualstar Corporation is an American manufacturer of magnetic tape data storage products, based in Simi Valley, California.

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Reel-to-reel audio tape recording

Reel-to/open-reel audio tape recording is the form of magnetic tape audio recording in which the recording medium is held on a reel, rather than being securely contained within a cassette.

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Run-length limited

Run-length limited or RLL coding is a line coding technique that is used to send arbitrary data over a communications channel with bandwidth limits.

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Self-clocking signal

In telecommunications and electronics, a self-clocking signal is one that can be decoded without the need for a separate clock signal or other source of synchronization.

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Sharp Corporation

is a Japanese multinational corporation that designs and manufactures electronic products, headquartered in Sakai-ku, Sakai.

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Sharp PC-1600

The Sharp PC-1600 was a pocket computer introduced by Sharp in 1986 as a successor to the PC-1500.

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Sirius Systems Technology

Sirius Systems Technology was a personal computer manufacturer in Scotts Valley, California.

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Steve Wozniak

Stephen Gary Wozniak (born on August 11, 1950), often referred to by the nickname Woz, is an American inventor, electronics engineer, programmer, philanthropist, and technology entrepreneur who co-founded Apple Computer, Inc.

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The Transactor

The Transactor was a computer magazine directed at users of Commodore home computers.

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UNIVAC

UNIVAC (Universal Automatic Computer) is a line of electronic digital stored-program computers starting with the products of the Eckert–Mauchly Computer Corporation.

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Victor Technology

Victor Technology LLC (also known as Victor Calculator) is a supplier of printing calculators, scientific calculators, financial calculators, basic calculators, and desktop accessories with headquarters in Bolingbrook, Illinois.

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Western Digital

Western Digital Corporation (abbreviated WDC, commonly shortened to Western Digital or WD) is an American computer data storage company and one of the largest computer hard disk drive manufacturers in the world, along with its main competitor Seagate Technology.

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Western Digital FD1771

The FD1771 is the first in a line of floppy disk controllers produced by Western Digital.

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Zone bit recording

In computer storage, zone bit recording (ZBR) is a method used by disk drives to optimise the tracks for increased data capacity.

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2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

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2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

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4B5B

In telecommunication, 4B5B is a form of data communications line code.

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8b/10b encoding

In telecommunications, 8b/10b is a line code that maps 8-bit words to 10-bit symbols to achieve DC-balance and bounded disparity, and yet provide enough state changes to allow reasonable clock recovery.

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9 track tape

The IBM System/360, released in 1964, introduced what is now generally known as 9 track tape.

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References

[1] https://en.wikipedia.org/wiki/Group_coded_recording

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