الوحده التانيه

Unit: 2
Computer essentials
Key Words:

Essentials – electronic – accept – certain – results – specified
Format – involved – fed into – instructions – screen – software
Hardware – peripherals – influential – component – function
Execute – coordinate – physical –attached – include – devices
Optical – permanent – mouse - keyboard – extract – printer
Rear – panel – ports – plug – wide – range – modems
Fax machines – scanners – configuration.

Abbreviations:

1. CPU: Central Processing Unit.
2. SSDs: Secondery Storage Devices.
3. H.D: Hard Disk.
4. F.D: Floppy Disk.
5. M.M: Main Memory.
6. I.M: Internal Memory.
7. VDU: Visual Display Unit.

Synonyms:

1. Main = internal.
2. Peripherals = configuration.
3. Information = data.
4. Certain = specified.
5. Floppy disk = diskette.

Definitions:

1. Computer: it is electronic machine which can accept data in a certain form process the data and give the results of the processing in a specified format as information.
2. Software:
i. It is the information in form of data and programs.
ii. It is the programs which can be used on particular computer system.

3. Hardware: it is the electronic and mechanical parts that make up a computer system.

4. CPU: it is the brain of the computer.

5. Input: it is the information which is presented to the computer.

6. Output: it is the results produced by a computer.

7. Peripherals: they are the hardware equipment attached to the CPU.

8. Monitor: it is visual display unit.

9. Floppy disk: it is a small device used to store information.

10. Port: any socket or channel in a computer system into which an input/output device may be connected.

Questions:

1. What are the 3 basic steps involved in process?
a. First: data is fed in to the computer's memory.
b. Then: when the program is run the computer performs a set of instructions and processes the data.
c. Finally: we can see the results on the screen or in printed form.

2. What are the 3 main sections consists of standard computer system?
a. Central processing unit (CPU).
b. Main memory (M.M).
c. Peripherals.

3. What is the main function of CPU?
Its function is to execute program instructions and coordinate the activities of the all other units.


4. What is the main function of M.M?
Its hold the instructions and data which are currently being processed by the CPU.

5. What are the main parts of peripherals?
a. Storage devices.
b. Input devices.
c. Output devices.

6. What is the main function of SSDs?
It's providing a permanent storage of both data and programs.

7. Why we use disk drivers?
We used it to handle one or more floppy disks.

8. What input devices enable us to do?
It enables us to feed data into the computer's memory.

9. What output devices enable us to do?
It enables us to extract the results from the computer.

10. What do the users of wearable technology consider themselves?
They consider themselves 'cyborgs'.

Wearable computer

Key Words:

Chic – imagine – battery – powered – vest – mobile – hands free
Operation – incorporating – equipped – scarf – consider – cybernetic
Organism – referring.

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