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Lee E. McMahon
Lee Edward McMahon (October 24, 1931–February 15, 1989) was an American computer scientist. __TOC__ Family and education McMahon was born in St. Louis, Missouri, to father Leo E. McMahon and mother Catherine McCarthy. He grew up in St. Louis and attended St. Louis University High School. In 1955 he received his bachelor's degree summa cum laude from St. Louis University. McMahon was awarded a regular graduate fellowship from the St. Louis University for study in psychology at Harvard University, where he then obtained a Ph.D. in psychology. His Ph.D. thesis at Harvard University was published in 1963 with the title "Grammatical analysis as a part of understanding a sentence". He was married to Helen G McMahon, and they had two children, Michael and Catherine. Bell Labs McMahon worked for Bell Labs from 1963 up until his death in 1989. He worked initially as a Linguistics Researcher and focussed around a language called FASE (Fundamentally Analyzable Simplified English) with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McMahon System Tournament
A McMahon system tournament is a tournament design for games such as go and chess that attempts to generalize and improve upon the Swiss system. As in a Swiss tournament, all players compete in the same number of rounds against various other players. Unlike Swiss, the players do not all start with zero points, but are awarded initial points based on their rating prior to the tournament. This gives starting advantage to higher rated players, but they will play tougher opponents from the very start. The system features an "upper bar", set to a specific rating, so that all players rated above that are considered to have a chance to win the tournament, and start with the same number of points. McMahon pairing matches players in each round against opponents that have equal or almost equal numbers of points so far. Players gain a point for each round they win or half a point for a draw. The player with the highest number of points after the last round is the tournament winner. Some s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missouri
Missouri is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas to the south and Oklahoma, Kansas and Nebraska to the west. In the south are the Ozarks, a forested highland, providing timber, minerals, and recreation. The Missouri River, after which the state is named, flows through the center into the Mississippi River, which makes up the eastern border. With more than six million residents, it is the List of U.S. states and territories by population, 19th-most populous state of the country. The largest urban areas are St. Louis, Kansas City, Missouri, Kansas City, Springfield, Missouri, Springfield and Columbia, Missouri, Columbia; the Capital city, capital is Jefferson City, Missouri, Jefferson City. Humans have inhabited w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Morris (cryptographer)
Robert H. Morris Sr. (July 25, 1932 – June 26, 2011) was an American cryptographer and computer scientist. __TOC__ Family and education Morris was born in Boston, Massachusetts. His parents were Walter W. Morris, a salesman, and Helen Kelly Morris, a homemaker. He received a bachelor's degree in mathematics from Harvard University in 1957 and a master's degree in applied mathematics from Harvard in 1958. He married Anne Farlow, and they had three children together: Robert Tappan Morris (author of the 1988 Morris worm), Meredith Morris, and Benjamin Morris. Bell Labs From 1960 until 1986, Morris was a researcher at Bell Labs and worked on Multics and later Unix. Together with Douglas McIlroy, he created M6 macro processor in FORTRAN IV, which was later ported to Unix. Using the TMG compiler-compiler, Morris, together with McIlroy, developed the early implementation of PL/I compiler called EPL for Multics project. The pair also contributed a version of runoff text-fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Computer Scientists
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard University Alumni
The list of Harvard University people includes notable graduates, professors, and administrators affiliated with Harvard University. For a list of notable non-graduates of Harvard, see notable non-graduate alumni of Harvard. For a list of Harvard's presidents, see President of Harvard University. Eight Presidents of the United States have graduated from Harvard University: John Adams, John Quincy Adams, Rutherford B. Hayes, John F. Kennedy, Franklin Delano Roosevelt, Theodore Roosevelt, George W. Bush, and Barack Obama. Bush graduated from Harvard Business School, Hayes and Obama from Harvard Law School, and the others from Harvard College. Over 150 Nobel Prize winners have been associated with the university as alumni, researchers or faculty. Nobel laureates Pulitzer Prize winners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go (game) Researchers
Go, GO, G.O., or Go! may refer to: Arts and entertainment Games and sport * Go (game), a board game for two players * ''Travel Go'' (formerly ''Go – The International Travel Game''), a game based on world travel * Go, the starting position located at the corner of the board in the board game ''Monopoly'' * ''Go'', a 1992 game for the Philips CD-i video game system * ''Go'', a large straw battering ram used in the Korean sport of Gossaum * Go!, a label under which U.S. Gold published ZX Spectrum games * Go route, a pattern run in American football * ''Go'' series, a turn-based, puzzle video game series by Square Enix, based on various Square Enix franchises * '' Counter-Strike: Global Offensive'' (''CS:GO''), a first-person shooter developed by Valve * ''Pokémon Go'', an augmented reality game Film * ''Go'' (1999 film), American film * ''Go'' (2001 film), a Japanese film * ''Go'' (2007 film), a Bollywood film * ''Go Karts'' (film), an Australian film also titled as '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unix People
Unix (; trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, whose development started in 1969 at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others. Initially intended for use inside the Bell System, AT&T licensed Unix to outside parties in the late 1970s, leading to a variety of both academic and commercial Unix variants from vendors including University of California, Berkeley ( BSD), Microsoft ( Xenix), Sun Microsystems (SunOS/ Solaris), HP/ HPE (HP-UX), and IBM ( AIX). In the early 1990s, AT&T sold its rights in Unix to Novell, which then sold the UNIX trademark to The Open Group, an industry consortium founded in 1996. The Open Group allows the use of the mark for certified operating systems that comply with the Single UNIX Specification (SUS). Unix systems are characterized by a modular design that is sometimes called the "Unix philosophy". According to this philoso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go (game)
Go is an abstract strategy board game for two players in which the aim is to surround more territory than the opponent. The game was invented in China more than 2,500 years ago and is believed to be the oldest board game continuously played to the present day. A 2016 survey by the International Go Federation's 75 member nations found that there are over 46 million people worldwide who know how to play Go and over 20 million current players, the majority of whom live in East Asia. The playing pieces are called stones. One player uses the white stones and the other, black. The players take turns placing the stones on the vacant intersections (''points'') of a board. Once placed on the board, stones may not be moved, but stones are removed from the board if the stone (or group of stones) is surrounded by opposing stones on all orthogonally adjacent points, in which case the stone or group is ''captured''. The game proceeds until neither player wishes to make another move. Whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Datakit
Datakit is a virtual circuit switch which was developed by Sandy Fraser at Bell Labs for both local-area and wide-area networks, and in widespread deployment by the Regional Bell Operating Companies (RBOCs). Datakit uses a cell relay protocol similar to Asynchronous Transfer Mode. Datakit is a connection-oriented switch, with all packets for a particular call traveling through the network over the same virtual circuit. Datakit networks are still in widespread use by the major telephone companies in the United States. Interfaces to these networks include TCP/IP and UDP, X.25, asynchronous protocols and several synchronous protocols, such as SDLC, HDLC, Bisync and others. These networks support host to terminal traffic and vice versa, host-to-host traffic, file transfers, remote login, remote printing, and remote command execution. At the physical layer, it can operate over multiple media, from slow speed EIA-232 to 500Mbit fiber optic links including 10/100 Megabit ethernet links. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cu (Unix Utility)
cu ("call Unix") is a Unix utility for establishing a connection between two computer systems via a serial port to another computer system. When cu was originally created, connections to remote systems were most often done by phone, and cu was used in conjunction with UUCP utilities to transfer data via a modem. Now that intersystem communications are much more easily and reliably handled via Internet connections, its more typical use is to establish a terminal connection to another system via a modem or direct cabling. It was originally released as part of the 4.2BSD Unix operating system in 1983, and is included in many Unix and Unix-like operating systems, including Solaris and Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which i .... Command-line arguments cu v -speed -lin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grep
grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. Its name comes from the ed command ''g/re/p'' (''globally search for a regular expression and print matching lines''), which has the same effect. grep was originally developed for the Unix operating system, but later available for all Unix-like systems and some others such as OS-9. History Before it was named, grep was a private utility written by Ken Thompson to search files for certain patterns. Doug McIlroy, unaware of its existence, asked Thompson to write such a program. Responding that he would think about such a utility overnight, Thompson actually corrected bugs and made improvements for about an hour on his own program called s (short for "search"). The next day he presented the program to McIlroy, who said it was exactly what he wanted. Thompson's account may explain the belief that grep was written overnight. Thompson wrote the first version in PDP-11 asse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qsort
qsort is a C standard library function that implements a polymorphic sorting algorithm for arrays of arbitrary objects according to a user-provided comparison function. It is named after the "quicker sort" algorithm (a quicksort variant due to R. S. Scowen), which was originally used to implement it in the Unix C library, although the C standard does not require it to implement quicksort. Implementations of the qsort function achieve polymorphism, the ability to sort different kinds of data, by taking a function pointer to a three-way comparison function, as well as a parameter that specifies the size of its individual input objects. The C standard requires the comparison function to implement a total order on the items in the input array. History A qsort function was implemented by Lee McMahon in 1972. It was in place in Version 3 Unix as a library function, but was then an assembler subroutine. A C version, with roughly the interface of the standard C version, was in-pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
