Computer Applications

Computer 

Welcome!

   To All of you Who is reading and Learning from This blog.

My name is Aditya Singh Chauhan and I am going to teach you

basics of computer.

SO LET ME KNOW IN COMMENTS WHO ARE INTERESTED IN COMPUTER ?

NOW,We will start from basics.

Q1. What is Computer?Computer stands for?

Ans. 1.1 Introduction and Definition of Computer The 20th century saw the birth of one of the most important tools widely in use today called a computer. Today, computers are used for communication, management, research, drawing and design as well as entertainment. This 21st century is being referred to as the digital age A computer is an electronic device that accepts user input (data) and processes it under the influence of a set of instructions referred to as programs to produce the desired output generally referred to as information. • Data are the raw facts may not make much meaning to the user. • Programs are set of instructions that instruct a computer what to do. • Information is result after data has been processed. ).The Computer works on one main principle, That is:

INPUT =>PROCESS=>OUTPUT

EXPLANATION

The computer takes input from user and process it by converting the action in binary form to make it understandable by the computer after this computer gives you desired outputs.

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Computer Parts There are 4 basic types of computer parts:

 a) Input devices - parts of the computer that allow information or data to be given to the computer like keyboard or a mouse. 

b) Storage devices – parts of the computer that hold information. The primary storage device is the computer’s memory called RAM (random access memory). It remembers everything that is read, input, or output. But, because the computer’s memory is on a temporary area—it forgets everything when turned off—it must have another place to store information permanently. This secondary storage device is usually a disk. 

c) Processing device – part of the computer that processes and controls the flow of information; it actually does the work. The one part of the computer that handles this job is the central processing unit or CPU.

 d) Output devices - parts of the computer that gives out information generated by the computer, like a monitor, printer or speaker.

Computers and their Functions Computer - An electronic device that receives data and computes high-speed mathematical or logical operations or that assembles, stores, correlates, or otherwise processes and presents information.

What makes a computer powerful?

 Speed------ A computer can do billions of actions per second.

 Reliability-------- Failures are usually due to human error, one way or another. (Blush for us all!) 

Storage----------- A computer can keep huge amounts of data.  

Glossary of Basic Concepts 

GUI – A Graphical User Interface – which uses visual displays to eliminate the need for typing commands.

 Formatting – The process of preparing a disc so that it can store information. During formatting, sectors, tracks, a director and the FAT are created on the disc.

 Sector – disc space normally 512 bytes long. 

Track – A track is also a data storage ring on a computer floppy diskette or hard disk drive that is capable of containing information. a track goes all around the platter and is used to help locate and retrieve information from a disk or diskette.

 Directory- an area on disc where information relating to a group of files is kept.

 FAT – the File Allocation

 Table – an area on disc where information is kept on which part of the disc the file is to be found. Directory tree – a pictorial representation of your disc’s structure.

 Boot – to start up the computer and load the DOS

. BIOS – The BASIC Input/Output System. It allows the core of the operating system to communicate with the hardware.

 Bit – a binary digit, the smallest unit of information that can be stores either as 1 or 0. Byte – a grouping of binary digits (0 or 1) which represent information