An operating system is a program that facilitates communication between users and computers while executing application programs. Key functions include process management, memory management, and input/output management, essential for resource allocation and device handling. Process management oversees the creation and termination of processes, while memory management allocates memory and input/output management coordinates hardware interactions.

1. Topic:
Operating System

3. Operating system (definition)
•An operating system is a program on which
application programs are executed and acts as
a communication interface between the user
and the computer.

4. Functions Of Opreating system
• Process Management
• Memory Management
• Input and output Management
• File Management
• Resource Management

5. Process Management
Process management involves various tasks like creation,
scheduling, termination of processes. Process is a program
that is under execution, which is an important part of
modern-day operating systems. The OS must allocate
resources that enable processes to share and exchange
information.

6. Memory Management
• The memory management function keeps track of the
status of each memory location, either allocated or free.
It determines how memory is allocated among competing
processes, deciding which gets memory, when they
receive it, and how much they are allowed.

7. Input and output Management
• Input and output management handles input to and
output from attached hardware devices, such as the
keyboard, mouse, monitor, hard disks, and printers.
Ensuring that device drivers are present and up to date is
another responsibility of the input/output management
layer.