COMPUTER FUNDAMENTALS AND APPLICATIONS
COMPUTER-INTRODUCTION
"Computer is an electronic device which is capable of receiving information (data) in a particular form and of performing a sequence of operations in accordance with a predetermined but variable set of procedural instructions (program) to produce a result in the form of information or signals".
"A computer is an electronic device that manipulates information, or "data." It has the ability to store, retrieve, and process data. You can use a computer to type documents, send email, and browse the internet. You can also use it to handle spreadsheets, accounting, database management, presentations, games, and more".
A computer is a programmable machine designed to perform arithmetic and logical operations automatically and sequentially on the input given by the user and gives the desired output after processing. Computer components are divided into two major categories namely hardware and software. Hardware is the machine itself and its connected devices such as monitor, keyboard, mouse etc. Software is the set of programs that make use of hardware for performing various functions.
Charles Babbage is called the "Father" of the computer. The First mechanical computer designed by Charles Babbage was called Analytical Engine. It uses read-only memory in the form of punch cards.
Four Functions about computer are:
1. accepts data - Input
2. processes data - Processing/Mill
3. produces output - Output
4. stores results - Storage
1. Input (Data):
Input raw information entered into a computer from the input devices. It is the collection of letters, numbers, images etc.
2. Process:
Process is the operation of data as per given instruction. It is totally internal process of the computer system.
3. Output:
Output is the processed data given by computer after data processing. Output is also called as Result. We can save these results in the storage devices for the future use.
