The Strange Birth and Long Life of Unix - IEEE Spectrum
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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. -
Communications of the Acm
COMMUNICATIONS CACM.ACM.ORG OF THEACM 11/2014 VOL.57 NO.11 Scene Understanding by Labeling Pixels Evolution of the Product Manager The Data on Diversity On Facebook, Most Ties Are Weak Keeping Online Reviews Honest Association for Computing Machinery tvx-full-page.pdf-newest.pdf 1 11/10/2013 12:03 3-5 JUNE, 2015 BRUSSELS, BELGIUM Course and Workshop C proposals by M 15 November 2014 Y CM Paper Submissions by MY 12 January 2015 CY CMY K Work in Progress, Demos, DC, & Industrial Submissions by 2 March 2015 Welcoming Submissions on Content Production Systems & Infrastructures Devices & Interaction Techniques Experience Design & Evaluation Media Studies Data Science & Recommendations Business Models & Marketing Innovative Concepts & Media Art TVX2015.COM [email protected] ACM Books M MORGAN& CLAYPOOL &C PUBLISHERS Publish your next book in the ACM Digital Library ACM Books is a new series of advanced level books for the computer science community, published by ACM in collaboration with Morgan & Claypool Publishers. I’m pleased that ACM Books is directed by a volunteer organization headed by a dynamic, informed, energetic, visionary Editor-in-Chief (Tamer Özsu), working closely with a forward-looking publisher (Morgan and Claypool). —Richard Snodgrass, University of Arizona books.acm.org ACM Books ◆ will include books from across the entire spectrum of computer science subject matter and will appeal to computing practitioners, researchers, educators, and students. ◆ will publish graduate level texts; research monographs/overviews of established and emerging fields; practitioner-level professional books; and books devoted to the history and social impact of computing. ◆ will be quickly and attractively published as ebooks and print volumes at affordable prices, and widely distributed in both print and digital formats through booksellers and to libraries and individual ACM members via the ACM Digital Library platform. -
Using NROFF and TROFF
Using NROFF and TROFF Part Number: 800-1755-10 Revision A, of 9 May 1988 UNIX is a registered trademark of AT&T. SunOS is a trademark of Sun Microsystems, Inc. Sun Workstation is a registered trademark of Sun Microsystems, Inc. Material in this manual comes from a number of sources: NrofflTroff User's Manual, Joseph F. Ossanna, Bell Laboratories, Murray Hill, New Jersey; A Troff Tutorial, Brian W. Kernighan, Bell Laboratories, Murray Hill, New Jersey; Typ ing Documents on the UNIXSystem: Using the -ms Macros with Troff and Nroff, M. E. Lesk, Bell Laboratories, Murray Hill, New Jersey; A Guide to Preparing Documents with -ms, M. E. Lesk, Bell Laboratories, Murray Hill, New Jersey; Document Formatting on UNIXUsing the -ms Macros, Joel Kies, University of California, Berkeley, California; Writing Papers with Nroff Using -me, Eric P. Allman, University of California, Berkeley; and Introducing the UNIXSystem, Henry McGilton, Rachel Morgan, McGraw-Hill Book Company, 1983. These materials are gratefully acknowledged. Copyright © 1987, 1988 by Sun Microsystems, Inc. This publication is protected by Federal Copyright Law, with all rights reserved. No part of this publication may be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form, or by any means manual, electric, electronic, electro-magnetic, mechanical, chemical, optical, or other wise, without prior explicit written permission from Sun Microsystems. Contents Chapter 1 Introduction . 1.1. nrof f andtrof f . Text Formatting Versus Word Processing TheEvolutionof nr of f andt ro f f Preprocessors and Postprocessors 1.2. tr of f, Typesetters, and Special-Purpose Formatters ............ 1.3. -
Lecture 1: Introduction to UNIX
The Operating System Course Overview Getting Started Lecture 1: Introduction to UNIX CS2042 - UNIX Tools September 29, 2008 Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages Lecture Outline 1 The Operating System Description and History UNIX Flavors Advantages and Disadvantages 2 Course Overview Class Specifics 3 Getting Started Login Information Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages What is UNIX? One of the first widely-used operating systems Basis for many modern OSes Helped set the standard for multi-tasking, multi-user systems Strictly a teaching tool (in its original form) Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages A Brief History of UNIX Origins The first version of UNIX was created in 1969 by a group of guys working for AT&T's Bell Labs. It was one of the first big projects written in the emerging C language. It gained popularity throughout the '70s and '80s, although non-AT&T versions eventually took the lion's share of the market. Predates Microsoft's DOS by 12 years! Lecture 1: UNIX Intro The Operating System Description and History Course Overview UNIX Flavors Getting Started Advantages and Disadvantages Lecture Outline 1 The Operating System Description and History UNIX Flavors Advantages and Disadvantages 2 Course Overview Class Specifics 3 -
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. -
Introduction to UNIX What Is UNIX? Why UNIX? Brief History of UNIX Early UNIX History UNIX Variants
What is UNIX? A modern computer operating system Introduction to UNIX Operating system: “a program that acts as an intermediary between a user of the computer and the computer hardware” CS 2204 Software that manages your computer’s resources (files, programs, disks, network, …) Class meeting 1 e.g. Windows, MacOS Modern: features for stability, flexibility, multiple users and programs, configurability, etc. *Notes by Doug Bowman and other members of the CS faculty at Virginia Tech. Copyright 2001-2003. (C) Doug Bowman, Virginia Tech, 2001- 2 Why UNIX? Brief history of UNIX Used in many scientific and industrial settings Ken Thompson & Dennis Richie Huge number of free and well-written originally developed the earliest software programs versions of UNIX at Bell Labs for Open-source OS internal use in 1970s Internet servers and services run on UNIX Borrowed best ideas from other Oss Largely hardware-independent Meant for programmers and computer Based on standards experts Meant to run on “mini computers” (C) Doug Bowman, Virginia Tech, 2001- 3 (C) Doug Bowman, Virginia Tech, 2001- 4 Early UNIX History UNIX variants Thompson also rewrote the operating system Two main threads of development: in high level language of his own design Berkeley software distribution (BSD) which he called B. Unix System Laboratories System V Sun: SunOS, Solaris The B language lacked many features and Ritchie decided to design a successor to B GNU: Linux (many flavors) which he called C. SGI: Irix They then rewrote UNIX in the C FreeBSD programming language to aid in portability. Hewlett-Packard: HP-UX Apple: OS X (Darwin) … (C) Doug Bowman, Virginia Tech, 2001- 5 (C) Doug Bowman, Virginia Tech, 2001- 6 1 Layers in the UNIX System UNIX Structure User Interface The kernel is the core of the UNIX Library Interface Users system, controlling the system Standard Utility Programs hardware and performing various low- (shell, editors, compilers, etc.) System Interface calls User Mode level functions. -
Open Source Legal Risk Management in the Enterprise, Version 1.2 - 2 of 7
Open Source Legal Risk Management in the Enterprise, Version 1.2 OPTAROS WHITE PAPER Realize the Benefits of Open Source Open Source Legal Risk Management in the Enterprise, Version 1.2 - 2 of 7 Table of Contents Introduction ..................................................................................................................................... 2 SCO Group vs. IBM............................................................................................................................ 2 License Management and Compliance .................................................................................................. 3 Patents and Property ......................................................................................................................... 4 Indemnification and Insurance ............................................................................................................ 5 Summary......................................................................................................................................... 6 About the Author Stephen Walli........................................................................................................... 7 About Optaros .................................................................................................................................. 7 Introduction There is sometimes confusion about how legally risky using free and open source software (FOSS) can be in the enterprise. These concerns center around: ♦ the SCO Group vs. IBM lawsuit, ♦ -
LINCS Server Release 1.0 Administration
LINCS Server Release 1.0 Administration 585-313-507 Comcode 108599200 October 1999 Issue 2 Copyright © 1999 by Lucent Technologies. All rights reserved. For trademark, regulatory compliance, and related legal information, see the copyright and legal notices section of this document. Copyright and legal notices Copyright Copyright © 1999 by Lucent Technologies. All rights reserved. Printed in the USA. This material is protected by the copyright laws of the United States and other countries. It may not be reproduced, distributed, or altered in any fashion by any entity (either internal or external to Lucent Technologies), except in accordance with applicable agreements, contracts or licensing, without the express written consent of the Business Communications Systems (BCS) Global Learning Solutions organization and the business management owner of the material. Acknowledgment This document was prepared by the Global Learning Solutions organization of the BCS division of Lucent Technologies. Offices are located in Denver CO, Columbus OH, Middletown NJ, and Basking Ridge NJ, USA. LINCS Server Administration 585-313-507 Issue 2 October 1999 iii Copyright and legal notices Trademarks Lucent Technologies has made every effort to supply the following trademark information about company names, products, and services mentioned in the LINCS server documentation library: • Adobe Systems, Inc. — Trademarks: Adobe, Acrobat. • Enhanced Software Technologies, Inc. — Trademark: Quickstart. • Equinox Systems, Inc — Registered trademark: Equinox • Hewlett Packard Corporation — Registered trademarks: Hewlett-Packard and HP • Intel Corporation — Registered trademarks: Pentium. • International Business Machines Corporation — Registered trademarks: IBM, VTAM. • Lucent Technologies — Registered trademarks: 4ESS, 5ESS, AUDIX, CONVERSANT, DEFINITY, Voice Power. Trademarks: FlexWord, Intuity, Lucent. • Microsoft Corporation — Registered trademarks: Excel, Internet Explorer, Microsoft, MS, MS-DOS, Windows, Windows NT. -
Cannibal Code
KIll it with Fire © 2021 by Marianne Bellotti 2 CANNIBAL CODE f technology advances in cycles, you might assume the best legacy I modernization strategy is to wait a decade or two for paradigms to shift back and leapfrog over. If only! For all that mainframes and clouds might have in common in general, they have a number of significant dif- ferences in the implementation that block easy transitions. While the architectural philosophy of time-sharing has come back in vogue, other components of technology have been advancing at a different pace. You can divide any single product into an infinite number of elements: hard- ware, software, interfaces, protocols, and so on. Then you can add specific techniques within those categories. Not all cycles are in sync. The odds of a modern piece of technology perfectly reflecting an older piece of tech- nology are as likely as finding two days where every star in the sky had the exact same position. So, the takeaway from understanding that technology advances in cycles isn’t that upgrades are easier the longer you wait, it’s that you should avoid upgrading to new technology simply because it’s new. KIll it with Fire © 2021 by Marianne Bellotti Alignable Differences and User Interfaces Without alignable differences, consumers can’t determine the value of the technology in which they are being asked to invest. Completely innovative technology is not a viable solution, because it has no refer- ence point to help it find its market. We often think of technology as being streamlined and efficient with no unnecessary bits without a clear purpose, but in fact, many forms of technology you depend on have ves- tigial features either inherited from other older forms of technology or imported later to create the illusion of feature parity. -
'Freeware' Programs - WSJ
4/24/2021 Linux Lawsuit Could Undercut Other 'Freeware' Programs - WSJ This copy is for your personal, non-commercial use only. To order presentation-ready copies for distribution to your colleagues, clients or customers visit https://www.djreprints.com. https://www.wsj.com/articles/SB106081595219055800 Linux Lawsuit Could Undercut Other 'Freeware' Programs By William M. BulkeleyStaff Reporter of THE WALL STREET JOURNAL Aug. 14, 2003 1159 pm ET (See Corrections & Amplifications item below.) To many observers, tiny SCO Group Inc.'s $3 billion copyright-infringement lawsuit against International Business Machines Corp., and SCO's related demands for stiff license fees from hundreds of users of the free Linux software, seem like little more than a financial shakedown. But the early legal maneuverings in the suit suggest the impact could be far broader. For the first time, the suit promises to test the legal underpinnings that have allowed free software such as Linux to become a potent challenge to programs made by Microsoft Corp. and others. Depending on the outcome, the suit could strengthen or drastically weaken the free-software juggernaut. The reason: In filing its legal response to the suit last week, IBM relied on an obscure software license that undergirds most of the free-software industry. Called the General Public License, or GPL, it requires that the software it covers, and derivative works as well, may be copied by anyone, free of charge. IBM's argument is that SCO, in effect, "signed" this license by distributing Linux for years, and therefore can't now turn around and demand fees. -
Lecture 10: File Systems File Systems, Databases, Cloud Storage
Lecture 10: File systems File systems, databases, cloud storage • file: a sequence of bytes stored on a computer – content is arbitrary (just bytes); any structure is imposed by the creator of the file, not by the operating system • file system: software that provides hierarchical storage and organization of files, usually on a single computer (or nearby) – a significant part of the operating system • database: an integrated collection of logically related records – data is organized and structured for efficient systematic access – may be distributed across lots of machines & geographically dispersed • database system: software that provides efficient access to information in a database – not usually part of the operating system • cloud storage: the same thing, but on someone else's computer(s) File systems: managing stored information • logical structure: users and programs see a hierarchy of folders (or directories) and files – a folder contains references to folder and files – "root" folder ultimately leads to all others – a file is just a sequence of bytes contents determined and interpreted by programs, not the operating system – a folder is a special file that contains names of other folders & files plus other information like size, time of change, etc. contents are completely controlled by the operating system • physical structure: disk drives operate in tracks, sectors, etc. – other storage devices have other physical properties • the operating system converts between these two views – does whatever is necessary to maintain the file/folder