What is a Computer
1. What is a Computer?
A computer is an electronic device that accepts data, processes it, stores it, and gives information.
DATA
Accepted as input
↓
PROCESS
Worked on, and also stored
↓
INFORMATION
Meaningful result given out
Key Idea: Data → Process → Information, and the data is also stored (STORE) during processing.
2. Types of Computers
Computers can be categorized in two ways: By Size and By Technology.
3. Based on Size
- Super Computer, most powerful computer
- Mainframe Computer, used by many users at the same time
- Minicomputer, medium-sized computer for multiple users
- Microcomputer, small computer for personal use, includes Desktop, Laptop, Tablet, Smartphone
Key Idea: As size decreases (Super → Mainframe → Mini → Micro), the number of simultaneous users also decreases.
4. Based on Technology
-
Analog Computer, works with continuous data Example
speedometer
-
Digital Computer, works with discrete data (0 and 1) Example
PC
-
Hybrid Computer, combines both analog and digital features Example
medical systems
Summary
- A computer accepts data, processes it, stores it, gives information
- Data → Process → Information, with Store happening alongside processing
- By size: Super, Mainframe, Mini, Microcomputer
- By technology: Analog, Digital, Hybrid
Remember: Size decides how many users can use the computer at once, technology decides what kind of data it handles.