Introduction to Operating Systems

3.1.2 q r s

Operating Systems

• How many can you name?

Learning Outcomes

• Describe the purpose of operating systems;

• Describe the characteristics of different types of operating systems and their uses: batch, real-time, single-user, multi-user, multi-tasking and distributed systems;

• Describe a range of applications requiring batch processing, and applications in which a rapid response is required;

Purpose of an OS

The operating system (OS) for a standalone computer will be much simpler than that of a supercomputer which is controlling hundreds of networked terminals and executing many different kinds of job simultaneously. Nevertheless, all operating systems perform the same basic functions.

These include:• Memory management;• File management (sometimes known as backing-store management);• Allocation of processor time;• Input and output management.

An operating system also manages:• Interrupts;• Errors;• The human/computer interface.

Different Types of OS

These are the different types of OS• batch• real-time• single-user • multi-user• multi-tasking • distributed systems

You will need to find out a bit of information about these OS. But first, what is a batch operating system?

Success Criteria

• What is the purpose of an operating system?– Mention at least 5 different function

• Describe the different OS• Find an example of each type.