types of operating system with single user and multiuser

TYPES OF OPERATING SYSTEMS

The main types of operating systems are as follows:

1. Batch Operating System – In this system , jobs are made into a batch and fed to the computer. The operating system loads the appropriate compiler to each job, compiles the programs, keeps track of error messages and facilitates smooth transition from job to job.

2. Multi-Programming Operating System – A multi programming operating system keeps in a computer’s memory , a set of jobs belonging to different users, schedules them on CPU, provides I/O facilities requested by each user and optimizes the use of the computer’s resources. 

The primary objective of a multi programming operating system is to maximize the number of programs executed by a computer in a specified  period and keep all the units of the computer simultaneously busy.

3. Time sharing Operating system – A time sharing operating allows a number of users to simultaneously use a computer. The primary  objective of a time shared operating system is to provide fast response to each user of the computer.

4. Personal Computer Operating System – The advent of personal computers (PCs) has brought about a revolution in computer use. The main advantage of use a PC is by a single user. Thus, operating system for PCs were designed as a single user single task operating system . MS-DOS along with BIOS (Basic Input Output System) is used an operating system for a PC.

BIOS is stored in a ROM supplied by the hardware vendor. BIOS provides the device drivers and initial program to load MS-DOS into memory. MS-DOS provides  services such as editing , file management and other utility programs.

MS-windows is an improved operating system. 

For more powerful PCs. This provides a very good Graphical User Interface (GUI) which simplifies the use of a computer. It also allows multiple programs to be simultaneously stored in memory  and executed.

5. UNIX Operating System - UNIX is a very popular multi user, time sharing operating system, implemented in a large class of machines from PCs to super computers. 

It is popular as it provides a very simple yet powerful command interpreter. UNIX is written in C, thus making it portable. UNIX is organized  as a layered operating system. The innermost part is called the kernel. 

unix OS

It provides services  such as device drivers and memory management. The next level is called the shell and is a command interpreter. The outermost level provides miscellaneous services. The user interacts with the kernel using commands and utilities.

6. Microsoft Disk Operating system (MS-DOS) – MS-DOS is the common software for the running of the personal computers (PCs). It was developed by Bill Gates and Paul Allen in early 1980s. Microsoft created MS-DOS for the IBM personal computers. It controls the Input/Output devices like monitors, printers, modem and disk drives etc. 

DOS is a single user and single tasking system. DOS version 1.0 was introduced in 1981.Since then, several new features have been incorporated into DOS.

MS-DOS

7. LINUX Operating System – Linux was developed keeping Unix as a reference model. Hence, the basic architecture and most of the features of Linux and Unix are the same. In other words, Linux is also considered as another version of Unix. Linux is available FREE. Red Hat Inc. is a Linux Software development company that prides itself on providing that change whether you are a long time open –source enthusiast or simply want to explore your desktop options. 

linux