Computer fundamental 🖥️

Computer is an advanced electronic devices that take place raw data as input from the user and the process these data under the control of instructions (called programmed) and give the result (output /information) and save output for future use.
In other word, computer does the followings :

‌✅ Accept store and input  the data

✅ Process the input datadata

✅ Output proceeds data in required form

INPUTS  ➡️. PROCESS  ➡️  OUTPUT

INPUT ~ In this step, the input data are prepared in some conventional form for processing. The  form will depend on the processing machine.
PROCESSING ~ In this step input data are changed to produce data in more useful form.
OUTPUT ~ Here, the result of the processing step is collected.
Examples of input devices ~
Keyboard, Mouse, Scanner, Digital Camera, Pendrive etc .
Examples of output devices ~
Moniter, Printer, Plotter etc.

Characteristics of computer

‌ Need a user interface ~ The main drawback of computer is, it cannot make own decision.

‌Speed ~ Computer is very fast. It takes only few second for calculation.

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‌Diligency ~ A computer is free form tiredness, lack of concentration. It can work for hours without creating any error

‌ Versatility~ It means the capacity to perform completely different type of work, you may use with the help of computer.

Example ~ Prepare pay roll slip, inventory management, prepare electric bills etc.

‌ Reliability~ The computer response to the instructions without any alteration.

‌ Storage capacity ~ Computer has the power of storing and information or data and information can be stored and as long as you required it.

‌ No IQ ~ a computer has no IQ, it cannot take its own decision as human being can.

‌ Programmability ~  The computer can program to do different type of accuracy.

Basic components of computer
‌C.P.U ~ The full form of CPU is central processing unit and it is the heart of computer. This is the component that actually execute instructions organised in program ( software) which  tells the computer want to do.

‌Memory ~ Enable a computer to store data, programs and intermediate results.

‌ Mass story device ~ Allow a computer to permanently retake large amount of data.

Example ~ Disk drive and tape drive.

‌ Input devices ~ These devices gives instructions to the computer.

‌Output devices ~ With the help of output devices we can see result.

‌ A.L.U ~ The full form of ALU is arithmetic logic unit and it can perform arithmetic operations.

‌C.U ~  The full form of CU is central unit and its generate the timing of signals which control the timing and sequence of operations. It is used for synchronising the events in the unit.

Block diagram of computer 🖥️

A computer can process data pictures, sound and graphics. They can solve highly complicated program quickly and accurately. A digital computer is an electronic machine for communication purpose. It accept digitalized informations from the users process, according to the sequence of instructions and proceed the resulting output information.
The hardware and software are the principal component of a computer. Basic computer for converting the data into information useful to their uses

‌ Inputting ~ The process of entering data or instructions into the computer system.

‌ Storing ~ Saving data and instructions to make readily available for initial or additional processing whenever required.

‌ Processing ~ Performing arithmetic operations or logical operations, on data to convert them into useful information.

‌Outputting ~ The process of reducing useful information or result for the user. Such as ~ A printed report visual display.

‌Controlling ~ The direction of manner and sequence in which all the above operations are performed.

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