What is aComputer?
• A computer is an electronic device that
processes data to produce information.
• It can store, retrieve, and process data
efficiently.
• Main functions: Input → Process → Output →
Storage.
3.
Major Categories ofComputers
• Based on size, power, and purpose, computers
are classified into:
• 1. Supercomputers
• 2. Mainframe Computers
• 3. Minicomputers (Mid-range)
• 4. Microcomputers (Personal Computers)
4.
Supercomputers
• Definition: Thefastest and most powerful
computers.
• Use: Weather forecasting, scientific research,
simulations, and cryptography.
• Examples: IBM Summit, Fugaku, Frontier.
5.
Mainframe Computers
• Definition:Large and powerful systems used
by big organizations.
• Use: Banking, government, airline
reservations, data processing.
• Features: Multi-user capability, high reliability,
and data security.
• Example: IBM Z Series.
6.
Minicomputers (Mid-range
Computers)
• Definition:Smaller than mainframes but still
handle large workloads.
• Use: Small and medium businesses,
manufacturing, or as servers.
• Example: DEC PDP, IBM AS/400.
Embedded Computers
• Definition:Computers built into other devices
to perform specific tasks.
• Examples: Smart TVs, washing machines,
ATMs, cars.
• Feature: Not user-programmable; designed for
one function.
9.
Comparison Table
• Typeof Computer | Speed | Size | Cost |
Users
• -------------------------------------------------
• Supercomputer | Fastest | Very large | Very
expensive | Many
• Mainframe | Very fast | Large | Expensive |
Many
• Minicomputer | Moderate | Medium |
Moderate | Few
• Microcomputer | Slower | Small | Affordable
10.
Summary
• Computers varyin size, power, and purpose.
• From supercomputers powering science to
microcomputers used at home, each type
plays an important role in modern life.