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Relational Database Systems
Informix Corporation, formerly Informix Software, Inc., was a software company located in Menlo Park, California. It was a developer of relational database software for computers using the Unix, Microsoft Windows, and Apple Macintosh operating systems. Timeline * 1980: Relational Database Systems Inc. was created by Roger Sippl.''International Directory of Company Histories'', Vol. 30, p. 243. Referenced i"History of Informix Corporation – FundingUniverse" "Originally named Relational Database Systems Inc., this software company was founded by 25-year-old entrepreneur Roger J. Sippl. ... In 1980 Sippl invested $200,000 in the new company and became its president, chief executive officer, and chairman." * 1986: The company changed its name to Informix Corporation and went public, raising $9 million. * 1989: Phillip E. White took over as chief executive. * 1996: Informix acquired Illustra Information Technologies, an object/relational database company. ''Universal Web Architec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Software
Software consists of computer programs that instruct the Execution (computing), execution of a computer. Software also includes design documents and specifications. The history of software is closely tied to the development of digital computers in the mid-20th century. Early programs were written in the machine language specific to the hardware. The introduction of high-level programming languages in 1958 allowed for more human-readable instructions, making software development easier and more portable across different computer architectures. Software in a programming language is run through a compiler or Interpreter (computing), interpreter to execution (computing), execute on the architecture's hardware. Over time, software has become complex, owing to developments in Computer network, networking, operating systems, and databases. Software can generally be categorized into two main types: # operating systems, which manage hardware resources and provide services for applicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISAM
Indexed Sequential Access Method (ISAM) is a method for creating, maintaining, and manipulating computer files of data so that records can be retrieved sequentially or randomly by one or more keys. Indexes of key fields are maintained to achieve fast retrieval of required file records in indexed files. IBM originally developed ISAM for mainframe computers, but implementations are available for most computer systems. The term ''ISAM'' is used for several related concepts: *The IBM ISAM product and the algorithm it employs. *A database system where an application developer directly uses an application programming interface to search indexes in order to locate records in data files. In contrast, a relational database uses a query optimizer which automatically selects indexes. *An indexing algorithm that allows both sequential and keyed access to data. Most databases use some variation of the B-tree for this purpose, although the original IBM ISAM and VSAM implementations did not d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Billboard
A billboard (also called a hoarding in the UK and many other parts of the world) is a large outdoor advertising structure (a billing board), typically found in high-traffic areas such as alongside busy roads. Billboards present large advertisements to passing pedestrians and drivers. Typically brands use billboards to build their brands or to push for their new products. The largest ordinary-sized billboards are located primarily on major highways, expressways, or principal arterials, and command high-density consumer exposure (mostly to vehicular traffic). These afford the greatest visibility due not only to their size, but because they allow creative "customizing" through extensions and embellishments. Posters are another common form of billboard advertising, located mostly along primary and secondary arterial roads. Posters are in a smaller format and are viewed primarily by residents and commuter traffic, with some pedestrian exposure. Advertising style Billboard advert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illustra
Illustra was a commercialized version of the Postgres object-relational database management system (DBMS) sold by Illustra Information Technologies, a company founded in 1992 and formed by Michael Stonebraker, Gary Morgenthaler and several of Michael Stonebraker's current and former students including: Wei Hong, Jeff Meredith, Michael Olson, Paula Hawthorn, Jeff Anton, Cimarron Taylor and Michael Ubell. The technology's extensibility model centered on DataBlade modules that defined types and associated index methods, operators, and functions for purposes and data domains that included Web publishing, search and manipulation of text, and management of geospatial information. It enabled all kinds of structured and unstructured multimedia data types to be stored as true objects in existing databases, and not just as parcels of data with object wrappers a la Oracle Corp. In 1995, NASA decided Illustra would be the right tool to store and manipulate millions of satellite photographs. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM RS/6000 SP
The Scalable POWERparallel (SP) is a discontinued series of supercomputers in the IBM RS/6000, RS/6000 line by IBM. The first model, the SP1, was introduced in February 1993, and new models were introduced throughout the 1990s until the RS/6000 was succeeded by IBM System p, eServer pSeries in October 2000. The SP is a distributed memory system, consisting of multiple RS/6000-based nodes interconnected by an IBM-proprietary switch called the High Performance Switch (HPS). The nodes are Computer cluster, clustered using software called PSSP, which is mainly written in Perl. Computer scientist Marc Snir was awarded the Seymour Cray Computer Engineering Award by the Institute of Electrical and Electronics Engineers in 2013 for his contributions to supercomputing, which included his work on the SP. Models Deployments * The Cornell Theory Center had a 512-node system that was ranked as the sixth fastest supercomputer in the world by the November 1995 edition of the TOP500, Top50 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shared-nothing Architecture
A shared-nothing architecture (SN) is a distributed computing architecture in which each update request is satisfied by a single node (processor/memory/storage unit) in a computer cluster. The intent is to eliminate contention among nodes. Nodes do not share (independently access) the same memory or storage. One alternative architecture is shared everything, in which requests are satisfied by arbitrary combinations of nodes. This may introduce contention, as multiple nodes may seek to update the same data at the same time. It also contrasts with shared-disk and shared-memory architectures. SN eliminates single points of failure, allowing the overall system to continue operating despite failures in individual nodes and allowing individual nodes to upgrade hardware or software without a system-wide shutdown. A SN system can scale simply by adding nodes, since no central resource bottlenecks the system. In databases, a term for the part of a database on a single node is a '' sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequent Computer Systems
Sequent Computer Systems, Inc. was a computer company that designed and manufactured multiprocessing computer systems. They were among the pioneers in high-performance symmetric multiprocessing (SMP) Open system (computing), open systems, innovating in both hardware (e.g., cache (computing), cache management and interrupt handling) and software (e.g., read-copy-update). Through a partnership with Oracle Corporation, Sequent became a dominant high-end Unix, UNIX platform in the late 1980s and early 1990s. Later they introduced a next-generation high-end platform for UNIX and Windows NT based on a non-uniform memory access architecture, NUMA-Q. As hardware prices fell in the late 1990s, and Intel shifted their server focus to the Itanium processor family, Sequent joined the Project Monterey effort in October 1998, which aimed to move a standard Unix to several new platforms. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashton-Tate
Ashton-Tate Corporation was a US-based software company best known for developing the popular dBASE database application and later acquiring Framework from the Forefront Corporation and MultiMate from Multimate International. It grew from a small garage-based company to become a multinational corporation. Once one of the "Big Three" software companies, which included Microsoft and Lotus, the company stumbled in the late 1980s and was sold to Borland in September 1991. History The history of Ashton-Tate and dBASE are intertwined and as such, must be discussed in parallel. Early history: dBASE II (1981–1983) In 1978, Martin Marietta programmer Wayne Ratliff wrote Vulcan, a database application, to help him make picks for football pools. Written in Intel 8080 assembly language, it ran on the CP/M operating system and was modeled on JPLDIS, a Univac 1108 program used at JPL and written by fellow programmer Jeb Long. Ashton-Tate was launched as a result of Georg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Database Engine
A database engine (or storage engine) is the underlying software component that a database management system (DBMS) uses to create, read, update and delete (CRUD) data from a database. Most database management systems include their own application programming interface (API) that allows the user to interact with their underlying engine without going through the user interface of the DBMS. The term "database engine" is frequently used interchangeably with " database server" or "database management system". A "database instance" refers to the processes and memory structures of the running database engine. Storage engines Many of the modern DBMS support multiple storage engines within the same database. For example, MySQL supports InnoDB as well as MyISAM. Some storage engines are transactional. Additional engine types include: * Embedded database engines * In-memory database engines Design considerations Information in a database is stored in the form of bits, laid out in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT&T
AT&T Inc., an abbreviation for its predecessor's former name, the American Telephone and Telegraph Company, is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's List of telecommunications companies, third largest telecommunications company by revenue and the List of mobile network operators in the United States, third largest wireless carrier in the United States behind T-Mobile US, T-Mobile and Verizon. As of 2023, AT&T was ranked 32nd on the Fortune 500, ''Fortune'' 500 rankings of the largest United States corporations, with revenues of $122.4 billion. The modern company to bear the AT&T name began its history as the American District Telegraph Company, formed in St. Louis in 1878. After expanding services to Arkansas, Kansas, Oklahoma and Texas through a series of mergers, it became the Southwestern Bell Telephone Company in 1920. Southwestern Bell was a subsidiary of AT&T Corporation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ingres (database)
Ingres Database ( ) is a proprietary SQL relational database management system intended to support large commercial and government applications. Actian Corporation controls the development of Ingres and makes certified binaries available for download, as well as providing worldwide support. There was an open source release of Ingres but it is no longer available for download from Actian. However, there is a version of the source code still available on GitHub. In its early years, Ingres was an important milestone in the history of database development. Ingres began as a research project at UC Berkeley, starting in the early 1970s and ending in 1985. During this time Ingres remained largely similar to IBM's seminal System R in concept; it differed in more permissive licensing of source code, in being based largely on DEC machines, both under UNIX and VAX/VMS, and in providing QUEL as a query language instead of SQL. QUEL was considered at the time to run truer to Edgar F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
