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Tree Meta
The TREE-META (or Tree Meta, TREEMETA) Translator Writing System is a compiler-compiler system for context-free languages originally developed in the 1960s. Parsing statements of the metalanguage resemble augmented Backus–Naur form with embedded tree-building directives. Unparsing rules include extensive tree-scanning and code-generation constructs. History TREE-META was instrumental in the development of NLS (oN-Line System) and was ported to many systems including the UNIVAC 1108, GE 645, SDS 940, ICL 1906A, PERQ, and UCSD p-System. Example This is a complete example of a TREE-META program extracted (and untested) from the more complete (declarations, conditionals, and blocks) example in Appendix 6 of the ICL 1900 TREE-META manual. That document also has a definition of TREE-META in TREE-META in Appendix 3. This program is not only a recognizer, but also outputs the assembly language for the input. It demonstrates one of the key features of TREE-META, which is tree pattern m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parser Generators
In computer science, a compiler-compiler or compiler generator is a programming tool that creates a parser, interpreter, or compiler from some form of formal description of a programming language and machine. The most common type of compiler-compiler is called a parser generator. It handles only syntactic analysis. A formal description of a language is usually a grammar used as an input to a parser generator. It often resembles Backus–Naur form (BNF), extended Backus–Naur form (EBNF), or has its own syntax. Grammar files describe a syntax of a generated compiler's target programming language and actions that should be taken against its specific constructs. Source code for a parser of the programming language is returned as the parser generator's output. This source code can then be compiled into a parser, which may be either standalone or embedded. The compiled parser then accepts the source code of the target programming language as an input and performs an action or outp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compiler-compiler
In computer science, a compiler-compiler or compiler generator is a programming tool that creates a Parsing#Computer_languages, parser, interpreter (computer software), interpreter, or compiler from some form of formal description of a programming language and machine. The most common type of compiler-compiler is called a parser generator. It handles only syntactic analysis. A formal description of a language is usually a formal grammar, grammar used as an input to a parser generator. It often resembles Backus–Naur form (BNF), extended Backus–Naur form (EBNF), or has its own syntax. Grammar files describe a Syntax (programming languages), syntax of a generated compiler's target programming language and actions that should be taken against its specific constructs. Source code for a parser of the programming language is returned as the parser generator's output. This source code can then be compiled into a parser, which may be either standalone or embedded. The compiled pars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeff Rulifson
Johns Frederick (Jeff) Rulifson (born August 20, 1941) is an American computer scientist. Early life and education Johns Frederick Rulifson was born August 20, 1941, in Bellefontaine, Ohio. His father was Erwin Charles Rulifson and mother was Virginia Helen Johns. Rulifson married Janet Irving on June 8, 1963, and had two children. He received a B.S. in mathematics from the University of Washington in 1966. Rulifson earned a Ph.D. in computer science from Stanford University in 1973. Career Rulifson joined the Augmentation Research Center, at the Stanford Research Institute (now SRI International) in 1966, working on a form of software called “timesharing”. He led the software team that implemented the oN-Line System (NLS), a system that foreshadowed many future developments in modern computing and networking. Specifically, Rulifson developed the command language for the NLS, among other features. His first job was to create the first display-based on the CDC 3100, and the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
META II
META II is a Domain-specific language, domain-specific programming language for writing compilers. It was created in 1963–1964 by Dewey Val Schorre at University of California, Los Angeles (UCLA). META II uses what Schorre called ''Syntax (programming languages), syntax equations''. Its operation is simply explained as: Each ''syntax equation'' is translated into a recursive Function (computer programming), subroutine which tests the input string for a particular phrase structure, and deletes it if found. Meta II programs are compiled into an Interpreter (computing), interpreted byte code language. VALGOL and SMALGOL compilers illustrating its capabilities were written in the META II language, VALGOL is a simple algebraic language designed for the purpose of illustrating META II. SMALGOL was a fairly large subset of ALGOL 60. Notation META II was first written in META I, a hand-compiled version of META II. The history is unclear as to whether META I was a full implementation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Domain-specific Programming Languages
Domain specificity is a theoretical position in cognitive science (especially modern cognitive development) that argues that many aspects of cognition are supported by specialized, presumably evolutionarily specified, learning devices. The position is a close relative of modularity of mind, but is considered more general in that it does not necessarily entail all the assumptions of Jerry Fodor, Fodorian modularity (e.g., informational encapsulation). Instead, it is properly described as a variant of psychological nativism. Other cognitive scientists also hold the mind to be modular, without the modules necessarily possessing the characteristics of Fodorian modularity. Domain specificity emerged in the aftermath of the cognitive revolution as a theoretical alternative to empiricism, empiricist theories that believed all learning can be driven by the operation of a few such general learning devices. Prominent examples of such domain-general views include Jean Piaget’s theory of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Programming Languages
A programming language is a system of notation for writing computer programs. Programming languages are described in terms of their syntax (form) and semantics (meaning), usually defined by a formal language. Languages usually provide features such as a type system, variables, and mechanisms for error handling. An implementation of a programming language is required in order to execute programs, namely an interpreter or a compiler. An interpreter directly executes the source code, while a compiler produces an executable program. Computer architecture has strongly influenced the design of programming languages, with the most common type ( imperative languages—which implement operations in a specified order) developed to perform well on the popular von Neumann architecture. While early programming languages were closely tied to the hardware, over time they have developed more abstraction to hide implementation details for greater simplicity. Thousands of programming langua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1960s Software
Year 196 ( CXCVI) was a leap year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Dexter and Messalla (or, less frequently, year 949 ''Ab urbe condita''). The denomination 196 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Septimius Severus attempts to assassinate Clodius Albinus but fails, causing Albinus to retaliate militarily. * Emperor Septimius Severus captures and sacks Byzantium; the city is rebuilt and regains its previous prosperity. * In order to assure the support of the Roman legion in Germany on his march to Rome, Clodius Albinus is declared Augustus by his army while crossing Gaul. * Hadrian's wall in Britain is partially destroyed. China * First year of the Jian'an Era, during the reign of the Xian Emperor of the Han. * The Xian Emperor returns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Griffiss International Airport
Griffiss International Airport is a public airport in the northeastern United States, located east of the central business district of Rome, a city in Oneida County, New York. Publicly-owned by the county, the airport is located on the former site of Griffiss Air Force Base, which closed in 1995. Four years later, the airfield hosted the Woodstock '99 music festival. Operations from the Oneida County Airport in Oriskany, about south, were transferred here in 2006, after which the county closed that airport in January 2007. Griffiss is a maintenance and storage facility for several regional airlines, including Republic Airways and Envoy Air. Facilities Griffiss International Airport covers an area of and contains one runway: * Runway 15/33: , Surface: Concrete For the 12-month period ending July 31, 2023, the airport had 32,880 aircraft operations; an average of 90 per day: 85% general aviation, 12% military, 3% air taxi, and <1% commercial. H ...
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Rome Laboratory
Rome Laboratory (Rome Air Development Center until 1991) is a U.S. Air Force research laboratory for " command, control, and communications" research and development and is responsible for planning and executing the USAF science and technology program. It is located at Griffiss International Airport, New York. The Griffiss airfield was previous Griffiss Air Force Base for decades. History The Rome Air Depot, established 5 February 1942 built U.S. versions of the British Norden bombsights and tested/rebuilt large airplane engines. From 1945 offices and laboratories were set up in buildings constructed during the war. The base was renamed Griffiss Air Force Base on 23 Jan 1948. Approximately mid-1948, Griffiss AFB received electronics research and development responsibilities from Headquarters, Air Materiel Command. The resources would come from Watson Laboratories and the Middletown testing units at Middletown, Pennsylvania ( Middletown Air Depot). Personnel from Middletown a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanford Research Institute
SRI International (SRI) is a nonprofit organization, nonprofit scientific research, scientific research institute and organization headquartered in Menlo Park, California, United States. It was established in 1946 by trustees of Stanford University to serve as a center of innovation to support economic development in the region. The organization was founded as the Stanford Research Institute. SRI formally separated from Stanford University in 1970 and became known as SRI International in 1977. SRI performs client-sponsored research and development for government agencies, commercial businesses, and private foundations. It also licenses its technologies, forms strategic partnerships, sells products, and creates Research spin-off, spin-off companies. SRI's headquarters are located near the Stanford University campus. SRI's annual revenue in 2014 was approximately $540 million, which tripled from 1998 under the leadership of Curtis Carlson. In 1998, the organization was on the ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basic/Four
Basic/Four is a variety of Business Basic which originally ran on computers of the same name introduced in 1971. The company that produced the system, Management Assistance, Inc., was later known as Basic/Four Corporation, MAI Basic Four, Inc., and MAI Basic Four Information Systems. Basic/Four set the pattern for the business BASIC market, with similar products appearing on other minicomputer systems, and later, microcomputers like the Apple III. It remained a popular product into the early 1980s, when increasingly powerful micros replaced it, and MAI turned to selling pre-packaged Basic/Four like accounting software. Basic/Four Corporation was created as a subsidiary of Management Assistance, Inc. in Irvine, California in 1971. Basic/Four initially sold small business minicomputers that were assembled from Microdata Corporation CPUs, but in 1976 they began selling their own 16-bit CPU designs. Over the next three years they introduced a series of models of these designs, the 200 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
