Ch-1 Computer System Overview
Ch-1 Computer System Overview
- 1.1 Introduction
- 1.2 Computer Components and Basic Computer Organization
- 1.2.1 Computer Organisation
- 1.2.2 Input Unit
- 1.2.3 Output Unit
- 1.2.4 The CPU (Central Processing Unit)
- 1.2.5 The Memory (Main Memory/Primary Memory]
- 1.2.6 Cache Memory
- 1.2.7 The Storage Unit
- 1.2.8 The System Bus
- 1.3 Mobile System Organization
- 1.4.1 System Software
1.4.2 Application Software
1.4.3 Software Libraries
- 1.4.1 System Software
Ch-1 Computer System Overview
Introduction – Computer System Overview
A computer system is an electronic device that takes input, processes it, stores data, and gives output. It works with both hardware and software to perform different tasks efficiently.
A computer system mainly has the following components:
Input Unit: Devices like keyboard and mouse that are used to give data or instructions to the computer.
Central Processing Unit (CPU): This is the brain of the computer. It processes the data. The CPU has two parts:
ALU (Arithmetic Logic Unit): It performs all arithmetic and logical operations.
CU (Control Unit): It controls and coordinates all parts of the computer.
Memory Unit: It stores data temporarily or permanently. It includes:
Primary Memory (RAM, ROM)
Secondary Storage (Hard Disk, SSD, etc.)
Output Unit: Devices like monitors and printers that display or provide the result of processed data.
Working of a Computer System
The computer system follows the IPO cycle:
Input → Process → Output