OPERATING SYSTEM AND COMPUTER SOFTWARE

Prepared by – Geetanjali,Soumya, Kanika,Varnita & Priyanka

Operating System

Operating System is an integrated set of programs that manages overall performance and functioning of the computer system by controlling the resources (CPU, memory, I/O devices etc) and overall flow of information within the system.

The operating system organises and controls the hardware.

Functions of Operating System Process Management - It takes care of

creation and deletion of processes. Memory Management – It takes care

of allocation and de-allocation of memory space to programs.

File Management – It takes care of file-related activities such as storage, retrieval, naming, sharing.

Device Management – It controls all I/O devices. It provides simple and easy to use interface.

TYPES OF OPERATING SYSTEM

Batch Processing

Multitasking

Multiprogramming

Real Time Systems

Multiprogramming Multiprogramming refers to a form of

processing in which computer holds more than one program in the memory and executes them concurrently on a multiuser operating system.

Multitasking Multitasking refers to form of processing

supported by most of current operating systems in which computer works on multiple tasks of one user with one central processor.

Multitasking eases user operation and saves lots of time when a user has to switch between two or more applications while performing a job.

Real Time Systems Real-Time system is a system that

satisfies the requirement of producing the desired results before a specified deadline.

Batch Processing system Similar type of jobs are firstly prepared

and they are stored on the card and then this card will be submitted to the system for processing. The system then perform all the operations on the instructions one by one.

Computer Software

System Software

• It is a set of one or more programs, which are designed to control the operation and processing capacity of a computer.

Application

Software

• Is a sequence of instructions coded in a programming language that directs computer hardware to perform specific data.