An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all of the other application programs in a computer.
Where’s the OS? • Structure: how is the OS organized? • Concurrency: how are parallel activities created and controlled? • Sharing: how are resources shared? • Naming: how are resources named by users? • Protection: how are distrusting parties protected from each other? • Security: how to authenticate, authorize, and ensure privacy?
Convenience: An operating system makes a computer system convenient and easy to use, for the user. Efficiency: An operating system allows the computer to use the computer hardware in an efficient way, by handling the details of the operations of the hardware.
– explain the structure and functions of an operating system, – illustrate key operating system aspects by concrete example, and – prepare you for future courses. . .
OPERATING SYSTEM Lecture Notes Lecture #1 What is an Operating System? A program that acts as an intermediary between a user of a computer and the computer hardware. An operating System is a collection of system programs that together control the operations of …
An operating system is a large, complex collection of software that manages the computer. All communication between the central processor and the keyboard, mouse, screen, computer disk and network is controlled by the operating system. It is the operating system that detects the click of a button or the movement of the mouse.
• Introduce you to operating system concepts - Hard to use a computer without interacting with OS - Understanding the OS makes you a more effective programmer • Cover important systems concepts in general - Caching, concurrency, memory management, I/O, protection • Teach you to deal with larger software systems
A computer system has many resources (hardware and software), which may be require to complete a task. Operating System is a system software that acts as an intermediary between a user and ComputerHardware to enable convenient …
Computer System and Operating System Overview: Overview of computer operating systems, operating systems functions, protection and security, distributed systems, special purpose systems, operating systems structures and systems calls, operating systems generation. What is an Operating System?
As part the rst lecture we will setup context for this sub-area in Computer Science and Engineering, understand its need, requirements and services, discuss a few key building blocks in the design of a modern operating system and end with a set of examples of the above. 1.1 What is an operating system?