Question

F. Answer the following questions.
1. What is abacus? Who invented it?
2. Explain any two devices used during ancient times for doing calculations.
3. Distinguish between:
a. Second generation and fourth generation computers
b. Minicomputer and microcomputer
4. What are the different types of computers? Briefly explain each of them
5. Explain any three types of microcomputers.
6. Write any three limitations of computer, .​

Answer 1

1. The abacus, also called a counting frame, is a calculating tool that has been in use since ancient times and is still in use today. It was used in the ancient Near East, Europe, China, and Russia, centuries before the adoption of the written Arabic numeral system. The exact origin of the abacus is still unknown.

2. As the earliest civilizations grew, merchants may have used stones or seeds to help them with equations. The beads of the abacus eventually became vital to the trade of goods and services. Other devices used before calculators include the slide rule, Napier's bones, and early machines like Babbage's analytical engine.

3. a) (2) speed is faster than first generation computer but not faster compare to microprocessor. (4) hard to handle in a single hand. power.

b) Microcomputers usually refer to laptop or desktop PCs that you use in a typical household, whereas minicomputers, which were primarily used from 1960 to 1980, are generally larger, but have limited functionality and slower processors.

4. Computer - Types

5. Types of Microcomputer with Pictures

• Desktop computer. The desktop computer belongs to the category of the microcomputer. ...

• Laptop. A laptop is a portable microcomputer, has an almost similar function to desktop computers. ...

• Smartphones. ...

• Tablet. ...

• PDA (Personal Digital Assistant) ...

• Server Microcomputer. ...

• Workstation.
• 6. Computer cannot operate without the instructions given by humans. It is programmed to work effectively, fast and accurately. ...

• Computer does not have intelligence of its own to complete the tasks. ...

• Lack of feeling is another limitation of computer. ...

• Computer has no learning power.