The document defines a computer as an electronic device that can accept data as input, process it, and provide output. It then describes the basic functions of a computer as entering data, processing it, and retrieving processed information. Some key features of computers mentioned are speed, accuracy, reliability, consistency, large storage capacity, and ability to act intelligently according to instructions. The document also lists common input devices, output devices, and components of a computer system including hardware, software, firmware, and liveware. It provides examples of how computers are used in various sectors such as schools, banking, hospitals, factories, and agriculture.

2. *electronical multipurpose data processing unit.
*Any device which can accept data or information
and put them into a series of process and gives the
desired output.

3. FUNCTIONS OF COMPUTER
• Basic functions of a computer are entering data , processing them and
retrieving processed data (information) .

5. FEATURES OF COMPUTER
• Speed and efficiency – can finish any given task within a short period of
time
• Accuracy – can provide correct information
• Reliability – you can rely on the process of output
• Consistency – produces consistent output when the same input is given
• Storage capacity – can store large amount of data
• Cost – initial cost is high
• Intelligence – can act according to the given instructions

6. DEVICE EMBEDDED WITH COMPUTER
SYSTEM
• Equipments like washing machines , mobile phones , modern motor vehicles
and modern televisions are operated by computer programme . computer
programs included in such equipment are known as DEVICESWITH
EMBEDED COMPUTER SYSTEMS.

7. COMPONENTS OF A COMPUTER

8. COMPUTER SYSTEM
• All the essential parts which required to function a computer.
1. Hardware
2. Software
3. Firmware
4. Live ware

9. HARDWARE
• Tangible or physical components of a computer system.
1. Input hardware
2. Output hardware
3. Processing hardware
4. Storage hardware
5. Communication hardware

10. INPUT HARDWARE
• A set machines which put data in to the computer memory.
• use -To give data to the computer
• E.g.:

11. OUTPUT DEVICES
• The devices which are used to retrieve data and information are called
output devices
e.g. :

12. Output devices
Output
devices
Hard
copy
Soft
copy

13. CENTRAL PROCESSING UNIT (CPU)
• Main component of a computer system .
• It is also called as the brain of the computer.
• It functions according to the given commands .
• CPU manages the operating system and application software.

14. COMPUTER SYSTEM
Computer
memory
Main
memory
RAM
ROM
Secondary
memory

15. RAM
• called as Random Access Memory.
• The device which is used to store data, information and instructions
temporarily is identified as the main memory or the primary memory.

16. STORAGE DEVICES
• The devices which are used to store data , information and instructions are
called storage devices.

17. Communication devices
• The devices which are used to exchange the processed data / information
are called communication devices.
e.g. :

18. Software
• A software is a set of programmes designed to execute certain tasks by
using a computer.
e.g. :
1. MS word word processing software – to prepare documents
2. Computer games
3. Video editing software
4. Painting software - to draw pictures
5. Media player - to listen songs and watch videos

19. Application of computers in various sectors

20. Schools
1.Working in the school office using computer.
computers simplify work and bring effectiveness to office work in the
school system.
2. Computer enabled learning situation
computers are used instead of blackboard and books in the learning
process.
3.Getting knowledge from the internet
obtain knowledge related to the subject .

21. Banking
1. An ATM machine
2. Paying bills by electronic cards
3. Internet banking

22. HOSPITALS
1.Digital thermometer
2.Use of computers and computer embedded devices in Intensive Care Unit .
3.Use of computers and computer embedded devices in an operation theatre.
ECG(electrocardiogram machine ) – Monitor the heart beat
EEG(electro-encephalography) - used to record the activities of the brain

23. factories
1. Use of robotic technology

24. agriculture
1. Meteorological devices
2. Automated insect control devices
3. Drip irrigation
4. Field conditions measuring devices
5. Automatic weed remover
6. Green house
7. Seedling planter using robotics
8. Crop harvesting using robots

25. • Meteorological devices
• Helpful in assessing the weather, climatic changes, rainfall, wind direction
• Useful in deciding deciding on the crop cultivation and harvesting times.
• Automated insect control
• Green house

27. UNIT 01 FINISHED