A Brief History of Operating Systems • Learning objectives • Develop a framework to think about system functionality and how and why it evolved • Explain how external forces (e g , technology and human capital) shape operating system design and functionality • Speculate realistically about what changes might lie on the
Analog Computers •An analog computer does not store information digitally •Values are stored as voltage levels •Analog computers are particularly useful solving nonlinear simultaneous differential equations •An electric circuit can be defined by an equation An analog computer is programmed by creating a circuit that follows a desired
Small cheap computers did the slow IO from paper tape to mag tape And from mag tape to the printer The big expensive computer used the mag tapes for IO Several programs submitted to the BEC on one tape The first parallelism in computer systems 6 Operating Systems Lecture 02 page Resident monitors The computer operators had formal procedures
simplified if a program (such as the operating system) would “abstract” the hardware (e g the disk) into a more usable form (e g /work/temp) However, although interfacing with the hardware is indeed an essential role of operating systems, the given definition is still far from including all critical aspects of an operating system These
thing in the world, and I concluded from that whole conversation that the thing to work on would be the communications between computers and to computers, because the computer stuff itself was a big team activity at that point, and one that I thought I knew how to handle anyway Both Corby had done a good
When personal computers became popular in the 1980s, operating systems were made for them similar in concept to those used on larger computers In the 1940s, the earliest electronic digital systems had no operating systems Electronic systems of this time were programmed on rows of mechanical switches or by jumper wires on plug boards These
Unix™ was first written for Space Travel, a computer game by Ken Thomson AT&T recognized their work and funded them with bigger systems In return they created roff, a text processing system before being able to proceed
of the prescribed text Operating Systems Concepts (8th edition) by Silberschatz, Galvin if errors - work out what they are and try again Small cheap computers did the slow IO from paper tape to mag tape And from Before the next lecture