1.1. Introduce a computer system
A computer is an electronic device, operating under the control of instructions stored in its own memory that can accept data (input), process the data according to specified rules, produce information (output), and store the information for future use
Functionalities of a computer
Any digital computer carries out five functions in gross terms:
· Take data as input
· Store data/instructions in its memory and use them when its required
· Process the data and convert into useful information
· Generate the output
· Control the all above mentioned four steps
Any kind of computers consists of HARDWARE AND SOFTWARE.
Hardware:
Computer hardware is the collection of physical elements that constitutes a computer system. Computer hardware refers to the physical parts or components of a computer such as the monitor, mouse, keyboard, computer data storage, hard drive disk (HDD), system unit (graphic cards, sound cards, memory, motherboard and chips), etc. all of which are physical objects that can be touched
Input Devices
Input device is any peripheral (piece of computer hardware equipment to provide data and control signals to an information processing system such as a computer or other information appliance.
Input device Translate data from form that humans understand to one that the computer can work with. Most common are keyboard and mouse
- Enseignant: SANYU ROSE