CS8493 OS Notes
Anna University Regulation 2017 CSE CS8493 OS Notes, OPERATING SYSTEM Lecture Handwritten Notes for all 5 units are provided below. Download link for CSE 4th Sem OPERATING SYSTEM Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.
CS8493 OS OPERATING SYSTEM
An operating system acts as an intermediary between the user of a computer and the computer
hardware. The purpose of an operating system is to provide an environment in which a user can execute
programs in a convenient and efficient manner.
An operating system is a program that manages a computer’s hardware. It also provides a basis for
application programs and acts as an intermediary between the computer user and the computer hardware. An
amazing aspect of operating systems is how they vary in accomplishing these tasks. Mainframe operating
systems are designed primarily to optimize utilization of hardware. Personal computer (PC) operating systems
support complex games, business applications, and everything in between. Operating systems for mobile
computers provide an environment in which a user can easily interface with the computer to execute
programs. Thus, some operating systems are designed to be convenient, others to be efficient, and others to
be some combination of the two.
1.2 Computer system overview
A computer system can be divided roughly into four components: the hardware, the operating
system, the application programs, and the users (Figure 1.1). The hardware—the central processing unit
(CPU), the memory, and the input/output (I/O) devices—provides the basic computing resources for the
system. The application programs—such as word processors, spreadsheets, compilers, and Web browsers—
define the ways in which these resources are used to solve users’ computing problems. The operating system
controls the hardware and coordinates its use among the various application programs for the various users.
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CS8493 OS Notes
Anna University 4th Sem CSE OS Lecture Handwritten Notes
CS8493 OPERATING SYSTEM Notes free download
Anna University CSE OS Notes Regulation 2017
CS8493 Notes, OS Unit wise Lecture Handwritten Notes – CSE 4th Semester