Introduction and Overview of the Multics System

Introduction and Overview of the Multics System

10 Pages · 2015 · 146 KB · English

Automatic management of the complex of flexible remote access, encourages users to view the system as a thinking .. Similarly, it is straightforward to write recursive procedures (i.e., subroutines capable of calling on themselves.

Introduction and Overview of the Multics System free download

Introduction and Overview of the Multics System F J Corbat? Massachusetts Institute of Technology Cambridge, Massachusetts and V A Vyssotsky Bell Telephone Laboratories, Inc Murray Hill, New Jersey Multics (Multiplexed Information and Computing Service) is a comprehensive, generalpurpose programming system which is being developed as a research project The initial Multics system will be implemented on the GE 645 computer One of the overall design goals is to create a computing system which is capable of meeting almost all of the present and nearfuture requirements of a large computer utility Such systems must run continuously and reliably 7 days a week, 24 hours a day in a way similar to telephone or power systems, and must be capable of meeting wide service demands: from multiple manmachine interaction to the sequential processing of absenteeuser jobs; from the use of the system with dedicated languages and subsystems to the programming of the system itself; and from centralized bulk card, tape, and printer facilities to remotely located terminals Such information processing and communication systems are believed to be essential for the future growth of computer use in business, in industry, in government and in scienti?c laboratories as well as stimulating applications which would be otherwise undone Because the system must ultimately be comprehensive and able to adapt to unknown future requirements, its framework must be general, and capable of evolving with time As brought out in the companion papers[15], this need for an evolutionary framework in?uences and contributes to much of the system design and is a major reason why most of the programming of the system will be done in the PL/I language[6] Because the PL/I language is largely machine independent (eg data descriptions refer to logical items, not physical words), the system should also be Speci?cally, it is hoped that future hardware improvements will not make system and user programs obsolete and that implementation of the entire system on other suitable computers will require only a moderate amount of additional programming The present paper attempts to give a detailed discussion of the design objectives as they relate to the major areas of the system Some of the highlights of the subsequent papers are: a virtual memory system for each user involving two dimensional addressing with segmentation and paging ; the dynamic linking of program segment crossreferences at execution time to minimize system overhead; the routine use of sharable, recursive, pure procedure programming within the system as the normal mode of operation; the pooled use of multiple processors, memory modules, and inputoutput controllers; and multiprogramming of all resources and of multiple users Automatic management of the complex of secondary storage media along with backup, retrieval, and maintenance procedures for the stored information will be provided by a ?le system Further, it is expected that most of the software of the system will be almost identical in form to user programs The system will incorporate automatic pageturning for both user and system programs alike Introduction As computers have matured during the last two decades from curiosities to calculating machines to information processors, access to them by users has not improved and in the case of most large machines has retrogressed Principally for economic reasons, batch processing of computer jobs has been developed and is currently practiced by most large computer installations, and the concomitant isolation of the user from elementary causeandeffect relationships has been either reluctantly endured or rationalized For several years a solution has been proposed to the access problem[79] This solution, usually called timesharing , is basically the rapid timedivision multiplexing of a central processor unit among the jobs of several users, each of which is on line at a typewriterlike console The rapid switching of the processor unit among user programs is, of course, nothing but a particular form of multiprogramming It is now abundantly clear that it is possible to create a generalpurpose timeshared multiaccess

------------- Read More -------------

Download introduction-and-overview-of-the-multics-system.pdf

Introduction and Overview of the Multics System related documents

System Framework for Cardiovascular Disease Prediction Based on Big Data Technology

10 Pages · 2017 · 3.12 MB · English

The framework was composed of data, speed, analysis, and service layers, all stored on distributed storage devices. Finally, we proposed a framework for a cardiovascular disease prediction system based on lambda architecture to solve the problems associated with the real-time analyses of big data.

The New Doctrinalism: Implications for Evidence Theory

23 Pages · 2015 · 165 KB · English

These accounts include Louis Kaplow's theory of the burden of proof, Daniel. Kahneman INTRODUCTION. Throughout . substantive entitlements and liabilities and how they limit normative claims with respect to probability corresponds to the quantum and variety of the evidence that confirms the 

DOCUMENT RESUME Carlson, Ruth Kearney Ten Values of Children's literature. 13p.; Paper ...

14 Pages · 2007 · 933 KB · English

the controversial book, Drop, -Dead (12), by Julia Cunningham depicts a lonely boy and his .. Holt, ilinehart and Winston, 1965. 6. Belting, Natalia. The Stars are Silver Reindeer. Banner Over Me,, A Tale of the Norman Conquest.

Privatisation of Security

150 Pages · 2015 · 2.88 MB · English

OAF. Operation Allied Force. OPSEC. Operational Security. OSINT. Open Source Intelligence. OUP. Operation Unified Protector. PA. Public Affairs to, Intelligence Collection, Targeting, Psychological Warfare, Offensive and The emergence of new war-fighting concepts, and the evolution of existing.

M.I.S. Management Information System

4 Pages · 2007 · 940 KB · English

M.I.S. Management Information System swiss made Software for production management, inventory control and traceability

school of arts and sciences ma in coaching &athletic administration

28 Pages · 2009 · 526 KB · English

TOEFL scores must meet the minimum university requirement which is 550 for the in the left hand column; then “Youth” and then scroll down to the last paragraph .. flexible process that has been called “a spiral of self-reflection.

Chapter 6: The Gettys and Ramseys

29 Pages · 2015 · 2.13 MB · English

see the end of this chapter, the family genealogy web site at had a daughter born December 12, 1821 who, according to the family Bible, was named Getty Ann

The Wider Benefits of Education and Training

98 Pages · 2008 · 498 KB · English

Department for Work and Pensions. Research Report No 178. Corporate Document Services. The wider benefits of education and training: a comparative longitudinal study. Peter Elias, Terence Hogarth and Gaëlle Pierre. A report of research carried out by Warwick Institute for Employment Research on 

ART 345 Introduction to Web Design

6 Pages · 2017 · 314 KB · English

An introduction to the design of interfaces for the Web using HTML and CSS. The course also addresses the There is one required text for the course, a technical guide to HTML/CSS. This text is available as a Our textbook is essential, and our stations in the labs have access to complete

Miraculous Medical Recoveries and the Islamic Tradition

6 Pages · 2007 · 68 KB · English

Newtonian-like mechanized processes play themselves out. injects into the subject of miracles sends a clear message to . prayer. All of these modalities, including a full embrace of modern allopathic medicines, are found in the Muslim pop- ulations of Europe, Asia and Africa, and now among the.