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UNIX and Computer Science Spreading UNIX Around the World: by Ronda Hauben an Interview with John Lions
Winter/Spring 1994 Celebrating 25 Years of UNIX Volume 6 No 1 "I believe all significant software movements start at the grassroots level. UNIX, after all, was not developed by the President of AT&T." Kouichi Kishida, UNIX Review, Feb., 1987 UNIX and Computer Science Spreading UNIX Around the World: by Ronda Hauben An Interview with John Lions [Editor's Note: This year, 1994, is the 25th anniversary of the [Editor's Note: Looking through some magazines in a local invention of UNIX in 1969 at Bell Labs. The following is university library, I came upon back issues of UNIX Review from a "Work In Progress" introduced at the USENIX from the mid 1980's. In these issues were articles by or inter- Summer 1993 Conference in Cincinnati, Ohio. This article is views with several of the pioneers who developed UNIX. As intended as a contribution to a discussion about the sig- part of my research for a paper about the history and devel- nificance of the UNIX breakthrough and the lessons to be opment of the early days of UNIX, I felt it would be helpful learned from it for making the next step forward.] to be able to ask some of these pioneers additional questions The Multics collaboration (1964-1968) had been created to based on the events and developments described in the UNIX "show that general-purpose, multiuser, timesharing systems Review Interviews. were viable." Based on the results of research gained at MIT Following is an interview conducted via E-mail with John using the MIT Compatible Time-Sharing System (CTSS), Lions, who wrote A Commentary on the UNIX Operating AT&T and GE agreed to work with MIT to build a "new System describing Version 6 UNIX to accompany the "UNIX hardware, a new operating system, a new file system, and a Operating System Source Code Level 6" for the students in new user interface." Though the project proceeded slowly his operating systems class at the University of New South and it took years to develop Multics, Doug Comer, a Profes- Wales in Australia. -
Tutorials Point, Simply Easy Learning
Tutorials Point, Simply Easy Learning UML Tutorial Tutorialspoint.com UNIX is a computer Operating System which is capable of handling activities from multiple users at the same time. Unix was originated around in 1969 at AT&T Bell Labs by Ken Thompson and Dennis Ritchie. This tutorial gives an initial push to start you with UNIX. For more detail kindly check tutorialspoint.com/unix What is Unix ? The UNIX operating system is a set of programs that act as a link between the computer and the user. The computer programs that allocate the system resources and coordinate all the details of the computer's internals is called the operating system or kernel. Users communicate with the kernel through a program known as the shell. The shell is a command line interpreter; it translates commands entered by the user and converts them into a language that is understood by the kernel. Unix was originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Douglas McIlroy, and Joe Ossanna. There are various Unix variants available in the market. Solaris Unix, AIX, UP Unix and BSD are few examples. Linux is also a flavour of Unix which is freely available. Several people can use a UNIX computer at the same time; hence UNIX is called a multiuser system. A user can also run multiple programs at the same time; hence UNIX is called multitasking. Unix Architecture: Here is a basic block diagram of a UNIX system: 1 | P a g e Tutorials Point, Simply Easy Learning The main concept that unites all versions of UNIX is the following four basics: Kernel: The kernel is the heart of the operating system. -
Introduction to Concurrent Programming
Introduction to Concurrent Programming Rob Pike Computing Sciences Research Center Bell Labs Lucent Technologies [email protected] February 2, 2000 1 Overview The world runs in parallel, but our usual model of software does not. Programming languages are sequential. This mismatch makes it hard to write systems software that provides the interface between a computer (or user) and the world. Solutions: processes, threads, concurrency, semaphores, spin locks, message-passing. But how do we use these things? Real problem: need an approach to writing concurrent software that guides our design and implementation. We will present our model for designing concurrent software. It’s been used in several languages for over a decade, producing everything from symbolic algebra packages to window systems. This course is not about parallel algorithms or using multiprocessors to run programs faster. It is about using the power of processes and communication to design elegant, responsive, reliable systems. 2 History (Biased towards Systems) Dijkstra: guarded commands, 1976. Hoare: Communicating Sequential Processes (CSP), (paper) 1978. Run multiple communicating guarded command sets in parallel. Hoare: CSP Book, 1985. Addition of channels to the model, rather than directly talking to processes. Cardelli and Pike: Squeak, 1983. Application of CSP model to user interfaces. Pike: Concurrent Window System, (paper) 1988. Application of Squeak approach to systems software. Pike: Newsqueak, 1989. Interpreted language; used to write toy window system. Winterbottom: Alef, 1994. True compiled concurrent language, used to write production systems software. Mullender: Thread library, 1999. Retrofit to C for general usability. 3 Other models exist Our approach is not the only way. -
Introduction to Computer System
Chapter 1 INTRODUCTION TO COMPUTER SYSTEM 1.0 Objectives 1.1 Introduction –Computer? 1.2 Evolution of Computers 1.3 Classification of Computers 1.4 Applications of Computers 1.5 Advantages and Disadvantages of Computers 1.6 Similarities Difference between computer and Human 1.7 A Computer System 1.8 Components of a Computer System 1.9 Summary 1.10 Check your Progress - Answers 1.11 Questions for Self – Study 1.12 Suggested Readings 1.0 OBJECTIVES After studying this chapter you will be able to: Learn the concept of a system in general and the computer system in specific. Learn and understand how the computers have evolved dramatically within a very short span, from very huge machines of the past, to very compact designs of the present with tremendous advances in technology. Understand the general classifications of computers. Study computer applications. Understand the typical characteristics of computers which are speed, accuracy, efficiency, storage capacity, versatility. Understand limitations of the computer. Discuss the similarities and differences between the human and the computer. Understand the Component of the computer. 1.1 INTRODUCTION- Computer Today, almost all of us in the world make use of computers in one way or the other. It finds applications in various fields of engineering, medicine, commercial, research and others. Not only in these sophisticated areas, but also in our daily lives, computers have become indispensable. They are present everywhere, in all the dev ices that we use daily like cars, games, washing machines, microwaves etc. and in day to day computations like banking, reservations, electronic mails, internet and many more. -
The Strange Birth and Long Life of Unix - IEEE Spectrum Page 1 of 6
The Strange Birth and Long Life of Unix - IEEE Spectrum Page 1 of 6 COMPUTING / SOFTWARE FEATURE The Strange Birth and Long Life of Unix The classic operating system turns 40, and its progeny abound By WARREN TOOMEY / DECEMBER 2011 They say that when one door closes on you, another opens. People generally offer this bit of wisdom just to lend some solace after a misfortune. But sometimes it's actually true. It certainly was for Ken Thompson and the late Dennis Ritchie, two of the greats of 20th-century information technology, when they created the Unix operating system, now considered one of the most inspiring and influential pieces of software ever written. A door had slammed shut for Thompson and Ritchie in March of 1969, when their employer, the American Telephone & Telegraph Co., withdrew from a collaborative project with the Photo: Alcatel-Lucent Massachusetts Institute of KEY FIGURES: Ken Thompson [seated] types as Dennis Ritchie looks on in 1972, shortly Technology and General Electric after they and their Bell Labs colleagues invented Unix. to create an interactive time- sharing system called Multics, which stood for "Multiplexed Information and Computing Service." Time-sharing, a technique that lets multiple people use a single computer simultaneously, had been invented only a decade earlier. Multics was to combine time-sharing with other technological advances of the era, allowing users to phone a computer from remote terminals and then read e -mail, edit documents, run calculations, and so forth. It was to be a great leap forward from the way computers were mostly being used, with people tediously preparing and submitting batch jobs on punch cards to be run one by one. -
FGVM-02 Architecture of Vehicle Multimedia Systems
International Telecommunication U n i o n ITU-T Technical Report TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (13 April 2021) Focus Group on Vehicular Multimedia (FG-VM) FGVM-02 Architecture of Vehicle Multimedia Systems - 2 - Acknowledgement This Technical Report was prepared under the leadership of Mr. Jun Li, Chair of ITU-T FG-VM (TIAA, China) and Yajun Kou, Chair of ITU-T FG-VM Working Group 2 (Global Fusion Media Technology and Development Co. Ltd, China). It is based on the contributions of numerous authors who participated in the Focus Group activities. Due credit is given to the following Focus Group participants: Srinivasagan Ayyappan, Yansong Guo (Great Wall Motors, Co, LTD, China); Yajun Kou, Jun Li (Global Fusion Media Technology and Development Co. Ltd, China); Koji Nakao (National Institute of Information and Communications Technology, Japan); Stiepan A. Kovac (QRCrypto SA; CEuniX.eu Project); Paolo Volpato, Francois Fischer (Huawei Technologies); Latif Ladid (IPv6 Forum); Jonas Walter (Technical University of Darmstadt Institute of Ergonomics & Human Factors); Gaëlle Martin-Cocher (InterDigital Canada, Lte, Canada); Prakash Ranganathan (University of North Dakota); Sébastien Ziegler, Anna Brékine, Cédric Crettaz (Mandat International); and Pradipta Biswas (Indian Institute of Science). Srinivasagan Ayyappan (Great Wall Motors, Co, LTD, China) served as the main Editor of this Technical Report. Stefano Polidori (Advisor), Mythili Menon (Project Officer), and Carolina Lima (Assistant) served as the FG-VM Secretariat. - -
The Strange Birth and Long Life of Unix - IEEE Spectrum
The Strange Birth and Long Life of Unix - IEEE Spectrum http://spectrum.ieee.org/computing/software/the-strange-birth-and-long-li... COMPUTING / SOFTWARE FEATURE The Strange Birth and Long Life of Unix The classic operating system turns 40, and its progeny abound By WARREN TOOMEY / DECEMBER 2011 They say that when one door closes on you, another opens. People generally offer this bit of wisdom just to lend some solace after a misfortune. But sometimes it's actually true. It certainly was for Ken Thompson and the late Dennis Ritchie, two of the greats of 20th-century information technology, when they created the Unix operating system, now considered one of the most inspiring and influential pieces of software ever written. A door had slammed shut for Thompson and Ritchie in March of 1969, when their employer, the American Telephone & Telegraph Co., withdrew from a collaborative project with the Photo: Alcatel-Lucent Massachusetts Institute of KEY FIGURES: Ken Thompson [seated] types as Dennis Ritchie looks on in 1972, shortly Technology and General Electric after they and their Bell Labs colleagues invented Unix. to create an interactive time-sharing system called Multics, which stood for "Multiplexed Information and Computing Service." Time-sharing, a technique that lets multiple people use a single computer simultaneously, had been invented only a decade earlier. Multics was to combine time-sharing with other technological advances of the era, allowing users to phone a computer from remote terminals and then read e-mail, edit documents, run calculations, and so forth. It was to be a great leap forward from the way computers were mostly being used, with people tediously preparing and submitting batch jobs on punch cards to be run one by one. -
12/04/13 1. Einleitung 1
12/04/13 1. Einleitung 1 1. Einleitung − Was ist Systemadministration? ============================================= 12/04/13 1. Einleitung 2 System Administration: It’s a dirty job, but someone said I had to do it. Aufgaben eines Sysadmin gestern und heute: Früher Heute − Einrichten von neuen Nutzern Auch heute gibt es neue User per Hand mit Scripte, Oberflächen automatisiert − Druckermanagment Tonerpatrone Wechseln, Druckerjobs canceln, Drucker reaktivieren, Nutzer beruhigen, Das ist immer noch so. "Der Drucker druckt nicht, ich habe nichts gemacht." − Fragen beantworten: "Wie kann ich ....?" Die Nutzer lesen immer Das "Dialog−Manual" noch keine Manuals. − Prozesse killen Auch heute sollen Prozesse noch endlos laufen. 12/04/13 1. Einleitung 3 Früher Heute − Prozesse/Daemone nach Möglich, aber es gibt Absturz neu starten auch Überwachungstools − Tastaturen aktivieren kommt seltener vor − Backups veranlassen Die Datenmengen sind (zeitzyklisch, häufig) nur viel größer. − Restore von Files Auch heute löschen Nutzer ihre Files unabsichtlich. − "Mein Rechner macht nichts mehr!!!!" Passiert seltener, da die Monitoring/Tracing Rechner schneller sind und mehr Prozessoren haben, gibt es dieses Problem nicht so oft. − Rebooting von Systemen Alle zwei bis drei Jahre kommt bei Fehlern so etwas noch vor. − Speicherplatz auf Platten schaffen Jeder erfüllte Wunsch erzeugt Hilferuf: "Ich kann nichts mehr viele neue kleine Wünsche speichern!!!!" − Sicherheitslöcher finden und Schlimmer als je zuvor, beseitigen, Einbrecher suchen dank Internet und verfolgen 12/04/13 1. Einleitung 4 Früher Heute − Passwörter prüfen Nicht mehr nötig dank neuer Technologien − Programme installieren Es soll auch heute noch neue Programme geben. Einheitliche Verfahren erleichtern aber die Arbeit. − Betriebssystemupdates Vereinfacht. − Konfiguration des Rechnernetzes ja − Installieren neuer Rechner. -
307-151 Issue 1 N N~Nnwtsystem V ~ U~ U~ Release 2.0 DOCUMENTER's WORKBENCH™ Software 'Text Formatters Reference
December 1983 307-151 Issue 1 n n~nnWTsystem V ~ U~ U~ Release 2.0 DOCUMENTER'S WORKBENCH™ Software 'Text Formatters Reference © 1983 Western Electric All Rights Reserved Printed in USA Western Electric ..... UNIX is a trademark of Bell Laboratories DOCUMENTER'S WORKBENCH is a trademark of Western Electric CONTENTS Chapter 1 INTRODUCTION Chapter 2 NROFF/TROFF TUTORIAL Chapter 3 NROFF AND TROFF USER MANUAL Chapter 4 DEVICE-INDEPENDENT TROFF Chapter 5 SROFF TUTORIAL GUIDE Chapter 6 SROFF REFERENCE MANUAL - I - Chapter 1 INTRODUCTION PAGE TEXT FORMATTERS ........................................... 1-1 Chapter 1 INTRODUCTION This book is a guide and reference manual for the text formatters that are provided with the UNIX* system DOCUMENTER'S WORKBENCHt software. This software provides an integrated set of text processing tools for easy, flexible, and professional documentation production. Books that describe other aspects of the DOCUMENTER'S WORKBENCH software are: • Introduction and Reference Manual-Select Code 307-150 • Macro Packages Reference-Select Code 307-152 • Preprocessors Reference-Select Code 307-153. The beginning user should refer to the DOCUMENTER'S WORKBENCH software Introduction and Reference Manual for a better overall description of the text processing tools available on the UNIX system. TEXT FORMATTERS On the DOCUMENTER'S WORKBENCH software, the text formatting programs provide control of text format by the use of requests (sometimes called formatter primitives) that are mixed in with the text to be formatted. These requests normally consist of two lowercase letters preceded by a period, on a line by themselves in the text file. The request may be followed on the same line by numbers or letters that provide the formatter with more information about the function of the request. -
1St Slide Set Operating Systems
Organizational Information Operating Systems Generations of Computer Systems and Operating Systems 1st Slide Set Operating Systems Prof. Dr. Christian Baun Frankfurt University of Applied Sciences (1971–2014: Fachhochschule Frankfurt am Main) Faculty of Computer Science and Engineering [email protected] Prof. Dr. Christian Baun – 1st Slide Set Operating Systems – Frankfurt University of Applied Sciences – WS2021 1/24 Organizational Information Operating Systems Generations of Computer Systems and Operating Systems Organizational Information E-Mail: [email protected] !!! Tell me when problems problems exist at an early stage !!! Homepage: http://www.christianbaun.de !!! Check the course page regularly !!! The homepage contains among others the lecture notes Presentation slides in English and German language Exercise sheets in English and German language Sample solutions of the exercise sheers Old exams and their sample solutions What is the password? There is no password! The content of the English and German slides is identical, but please use the English slides for the exam preparation to become familiar with the technical terms Prof. Dr. Christian Baun – 1st Slide Set Operating Systems – Frankfurt University of Applied Sciences – WS2021 2/24 Organizational Information Operating Systems Generations of Computer Systems and Operating Systems Literature My slide sets were the basis for these books The two-column layout (English/German) of the bilingual book is quite useful for this course You can download both books for free via the FRA-UAS library from the intranet Prof. Dr. Christian Baun – 1st Slide Set Operating Systems – Frankfurt University of Applied Sciences – WS2021 3/24 Organizational Information Operating Systems Generations of Computer Systems and Operating Systems Learning Objectives of this Slide Set At the end of this slide set You know/understand. -
Computing Science Technical Report No. 99 a History of Computing Research* at Bell Laboratories (1937-1975)
Computing Science Technical Report No. 99 A History of Computing Research* at Bell Laboratories (1937-1975) Bernard D. Holbrook W. Stanley Brown 1. INTRODUCTION Basically there are two varieties of modern electrical computers, analog and digital, corresponding respectively to the much older slide rule and abacus. Analog computers deal with continuous information, such as real numbers and waveforms, while digital computers handle discrete information, such as letters and digits. An analog computer is limited to the approximate solution of mathematical problems for which a physical analog can be found, while a digital computer can carry out any precisely specified logical proce- dure on any symbolic information, and can, in principle, obtain numerical results to any desired accuracy. For these reasons, digital computers have become the focal point of modern computer science, although analog computing facilities remain of great importance, particularly for specialized applications. It is no accident that Bell Labs was deeply involved with the origins of both analog and digital com- puters, since it was fundamentally concerned with the principles and processes of electrical communication. Electrical analog computation is based on the classic technology of telephone transmission, and digital computation on that of telephone switching. Moreover, Bell Labs found itself, by the early 1930s, with a rapidly growing load of design calculations. These calculations were performed in part with slide rules and, mainly, with desk calculators. The magnitude of this load of very tedious routine computation and the necessity of carefully checking it indicated a need for new methods. The result of this need was a request in 1928 from a design department, heavily burdened with calculations on complex numbers, to the Mathe- matical Research Department for suggestions as to possible improvements in computational methods. -
UNIX™ System V DOCUMENTER's WORKBENCH™ Volume ONE
___ALTOS _ UNIX™ SySTEM V DOCUMENTER'S WORKBENCH™ VOlUME ONE INTROduCTioN ANd TEXT FORMATTERS REfERENCE UNIX™ System V DOCUMENTER'S WORKBENCH™ Volume One ACKNOW'LBDGBMEN'rS The Altos logo, as it appears in this manual, is a registered trademark of Altos Computer Systems. DOCUMENTER IS WORKBENCH™ is a trademark of AT&T Technologies. IMPRINT@ and IMAGEN® are registered trademarks of the IMAGEN Corporation. TEKTRONIX® is a registered trademark of Tektronics, Inc. TELETYPE™ is a trademark of AT&T Teletype Corporation. TRENDATA® is a registered trademark of Trendata Corporation. UNIX™ is a tr ademark of AT &'1' Bell Labor at or ies. CONTENTS Chapter 1 DOCUMENTER'S WORKBENCH SOFTWARE Chapter 2 DOCUMENT PREPARATION APPENDIX USER REFERENCE MANUAL - i - Chapter 1 DOCUMENTER'S WORKBENCH SOFTWARE PAGE INTRODUCTION............................................... 1-1 HOW TO USE THIS BOOK. • . • . .. 1-2 I!.. 1 ,J Chapter 1 DOCUMENTER'S WORKBENCH SOFTWARE INTRODUCTION This book is the introductory volume of a set of documents that provide information about the DOCUMENTER'S WORKBENCH software on the UNIX* system. Other books in this series are: 307-151 Text Formatters Reference-provides a reference covering the text formatters nroff, troff (device independent), otroff (old troff), and sroff. 307 -152 Macro Packages Reference-provides a reference for the macro packages mm (memorandum macros), sroff/mm (mm macros for the sroff formatter), and mv (view graph macros). 307-153 Preprocessors Reference-provides a reference for the preprocessors tbl, pic, and eqn/neqn. This book is both an introduction to the DOCUMENTER'S WORKBENCH software and a DOCUMENTER'S WORKBENCH software command reference manual. Chapter 2 contains introductory material on some of the software, and the appendix provides pages describing the various commands that are part of the DOCUMENTER'S WORKBENCH software.