Modern Operating Systems Modern Operating Systems
... – These processors share same main memory and I/O facilities – All processors can perform the same ...
... – These processors share same main memory and I/O facilities – All processors can perform the same ...
Introduction to Unix
... Most personal PCs (either Windows or Macintosh based) are single-user machines. 1 keyboard, 1 monitor, intended to serve just one person. ...
... Most personal PCs (either Windows or Macintosh based) are single-user machines. 1 keyboard, 1 monitor, intended to serve just one person. ...
Slides About Systems - Duke Database Devils
... Large, long-lived software systems are like buildings. They are built by workers using standard design patterns. They depend on some underlying infrastructure. But they can evolve and are not limited by the laws of physics. ...
... Large, long-lived software systems are like buildings. They are built by workers using standard design patterns. They depend on some underlying infrastructure. But they can evolve and are not limited by the laws of physics. ...
History of Unix OS
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create an multi-user operating system to run “space travel” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do on ...
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create an multi-user operating system to run “space travel” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do on ...
Overview and History
... real-time class contains threads with priorities ranging from 16 to 32 variable class contains threads having priorities from 0 to 15 kernel automatically adjusts priorities based on CPU utilization enables I/O-bound threads to keep the I/O devices busy CPU-bound threads soak up the spare CPU ...
... real-time class contains threads with priorities ranging from 16 to 32 variable class contains threads having priorities from 0 to 15 kernel automatically adjusts priorities based on CPU utilization enables I/O-bound threads to keep the I/O devices busy CPU-bound threads soak up the spare CPU ...
CS111—Operating System Principles
... A Very Brief History of Linux and UNIX Operating System (From Linux Core Kernel Commentary) UNIX was originally developed in 1969 by Ken Thompson and Dennis Ritchie at AT&T’s Bell Laboratories; it was initially a single-user operating system written in assembler. In short order, it was rewritten in ...
... A Very Brief History of Linux and UNIX Operating System (From Linux Core Kernel Commentary) UNIX was originally developed in 1969 by Ken Thompson and Dennis Ritchie at AT&T’s Bell Laboratories; it was initially a single-user operating system written in assembler. In short order, it was rewritten in ...
History of Unix OS - Seneca
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create an multi-user operating system to run “space wars” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one ...
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create an multi-user operating system to run “space wars” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one ...
CIS 721 - Lecture 1
... software on top of bare hardware) and a resource manager (software that controls access to computer). • It interacts with two agencies: applications and a command language interpreter. • DOS, Windows, Mac OS, and UNIX are examples of the operating system. ...
... software on top of bare hardware) and a resource manager (software that controls access to computer). • It interacts with two agencies: applications and a command language interpreter. • DOS, Windows, Mac OS, and UNIX are examples of the operating system. ...
Answers
... Note: At this point, these exercises do not have to be turned in. The point of the exercises is to help you reflect on and better understand the course material. We will have an in-class discussion on these exercises on 1/23. 1. Who are the two main programmers that wrote UNIX, and what were their r ...
... Note: At this point, these exercises do not have to be turned in. The point of the exercises is to help you reflect on and better understand the course material. We will have an in-class discussion on these exercises on 1/23. 1. Who are the two main programmers that wrote UNIX, and what were their r ...
01-intro
... Introduction to Systems Concepts and Systems Programming University of Illinois Custom Edition Copyright © 2007 Pearson Custom Publishing ISBN 0-536-48928-9 Taken from: ...
... Introduction to Systems Concepts and Systems Programming University of Illinois Custom Edition Copyright © 2007 Pearson Custom Publishing ISBN 0-536-48928-9 Taken from: ...
Unix History, and Background
... programs to run on different Unix variants. • As long as the operating system uses POSIX compliant mechanisms, it can run software regardless of the actual variant used. • POSIX standard (1003) is administered by IEEE (Institute of Electrical and Electronics Engineers) • The standard is also recogni ...
... programs to run on different Unix variants. • As long as the operating system uses POSIX compliant mechanisms, it can run software regardless of the actual variant used. • POSIX standard (1003) is administered by IEEE (Institute of Electrical and Electronics Engineers) • The standard is also recogni ...
History of Unix OS - Seneca
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create a multi-user operating system to run “space travel” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one ...
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create a multi-user operating system to run “space travel” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one ...
Operating System Concepts, Terminology, and History
... • Run-control files and other aspects of system administration vary between distributions. ...
... • Run-control files and other aspects of system administration vary between distributions. ...
Chapter 2 Operating System Overview
... • Provides a uniform means for applications to communicate via RPCs • Provides base for distributed computing ...
... • Provides a uniform means for applications to communicate via RPCs • Provides base for distributed computing ...
Answers
... 1. Who are the two main programmers that wrote UNIX, and what were their roles? Dennis Ritchie – primary inventor of the C language, co-inventor of UNIX Ken Thompson – Inventor of UNIX, contributed to C language. (Also inventor of B language) 2. What is POSIX? Portable Operating System Interface for ...
... 1. Who are the two main programmers that wrote UNIX, and what were their roles? Dennis Ritchie – primary inventor of the C language, co-inventor of UNIX Ken Thompson – Inventor of UNIX, contributed to C language. (Also inventor of B language) 2. What is POSIX? Portable Operating System Interface for ...
PowerPoint - cse.sc.edu
... Research, not commercial PDP-11 was popular with an unusable OS AT&T’s legal concerns – Not allowed to enter computer business but needed to write software to help with switches – Licensed cheaply or free ...
... Research, not commercial PDP-11 was popular with an unusable OS AT&T’s legal concerns – Not allowed to enter computer business but needed to write software to help with switches – Licensed cheaply or free ...
Document
... Introduction to Systems Concepts and Systems Programming University of Illinois Custom Edition Copyright © 2007 Pearson Custom Publishing ISBN 0-536-48928-9 Taken from: ...
... Introduction to Systems Concepts and Systems Programming University of Illinois Custom Edition Copyright © 2007 Pearson Custom Publishing ISBN 0-536-48928-9 Taken from: ...
UNIX/LINUX
... Built in the C programming language, UNIX, and its clones, offer a unified filesystem defined by a modular design(being able to add and remove directories, files, etc). ...
... Built in the C programming language, UNIX, and its clones, offer a unified filesystem defined by a modular design(being able to add and remove directories, files, etc). ...
The UNIX Operating System - Niagara College Technology
... Mature, reliable software based on well-accepted operating system design principles. ...
... Mature, reliable software based on well-accepted operating system design principles. ...
CS211 Slides
... – Manages the processes and resources – Controls and hides the hardware Shell ...
... – Manages the processes and resources – Controls and hides the hardware Shell ...
Chapter 3: System Software
... Copy files Move files System/file backup Rename files Erase files ...
... Copy files Move files System/file backup Rename files Erase files ...
History of UNIX a short version
... the Multics ideas on his own (most of which were shot down by AT&T) ...
... the Multics ideas on his own (most of which were shot down by AT&T) ...
Chapter 1: Welcome to Linux - Business and Computer Science
... Enter Unix, pride of Bell Labs • Originally written in PDP-7 assembly language by Ken Thompson • To make it work on multiple architectures (portable), Thompson rewrote Unix in B • Dennis Ritchie developed C, and with Thompson, rewrote Unix in C ...
... Enter Unix, pride of Bell Labs • Originally written in PDP-7 assembly language by Ken Thompson • To make it work on multiple architectures (portable), Thompson rewrote Unix in B • Dennis Ritchie developed C, and with Thompson, rewrote Unix in C ...
Berkeley Software Distribution
Berkeley Software Distribution (BSD) is a Unix operating system derivative developed and distributed by the Computer Systems Research Group (CSRG) of the University of California, Berkeley, from 1977 to 1995. Today the term ""BSD"" is often used non-specifically to refer to any of the BSD descendants which together form a branch of the family of Unix-like operating systems. Operating systems derived from the original BSD code remain actively developed and widely used.Historically, BSD has been considered a branch of Unix, Berkeley Unix, because it shared the initial codebase and design with the original AT&T Unix operating system. In the 1980s, BSD was widely adopted by vendors of workstation-class systems in the form of proprietary Unix variants such as DEC ULTRIX and Sun Microsystems SunOS. This can be attributed to the ease with which it could be licensed, and the familiarity the founders of many technology companies of the time had with it.Although these proprietary BSD derivatives were largely superseded by the UNIX System V Release 4 and OSF/1 systems in the 1990s (both of which incorporated BSD code and are the basis of other modern Unix systems), later BSD releases provided a basis for several open source development projects, e.g. FreeBSD, OpenBSD, NetBSD, Darwin or PC-BSD, that are ongoing. These, in turn, have been incorporated in whole or in part in modern proprietary operating systems, e.g. the TCP/IP networking code in Windows NT 3.1 and most of the foundation of Apple's OS X and iOS.