UNIT 2

Software : The instructions that control the hardware

Input

Processing

Output

Hardware : The physical components of a computer system that you can see and touch.

Every Computer:

Processing

Output

Input

Device : a hardware component of a computer system consisting of electronic components

Storage Device : a device used to store data onto a storage medium

Input Device : a device that allows data to be entered into computer system

Volatile : data is lost when there is no power

Non-Volatile : data remains when there is no power.

User interference : communication between the user and the computer system

Operation System : an operating system manages hardware by carrying out tasks such as

  1. allocating memory to software
  2. sending data instructions to output devices

Utility Software : is system software that performs some sort of maintenance on the computer system

Data compression : Data compression utilities will reduce the original size of files so that they use up less storage space.

Backup Utilities : they create a second copy of data and programs that are in storage