Showing posts with label Artical. Show all posts
Showing posts with label Artical. Show all posts

Saturday, 5 July 2014

Computer Fundamentals Tutorials

Hello Friends Today in This post is
Computer is an advanced electronic device that takes raw data as input from the user and processes these data under the control of set of instructions (called program) and gives the result (output) and saves output for the future use.

This Computer Fundamentals

tutorial covers a foundational understanding of computer hardware, software, operating systems, peripherals, etc., and how to get the most value and impact from computer technology.

Audience

This tutorial has been prepared for the beginners as well as advanced learners, who want to deal with computers. This tutorial is also very useful for the undergraduate students of computer science, engineering, business administration, management, science, commerce and arts where an introductory course on computers is a part of curriculum. After completing this tutorial, you will find yourself at a moderate level of expertise in knowledge of Computer basics from where you can take yourself to next levels.

Prerequisites
Knowledge of computers is not a prerequisite to follow the contents of this tutorial. This tutorial assumes no background in computers or computer programming.

Sunday, 18 August 2013

What is a Printer


The Computer system needs to convert the document to a format, which is understandable by the printer for printing. The device drive of a printer helps convert a document to a format, which is understandable by the printer. The performance of a printer is determined by the parameters, Dots Per Inch (DIP) and And Pages Par Minute (PPM).
The DPI parameter of a printer, the better is the quality of the output generated. The PPM parameter of a printer represents the number of pages that are produce par minuter. Printers can by classified on the best of technology that they use to print the text and image:



A dot matrix printer uses perforated sheets to print text. Dot matrix printers are impact printers as they print the text on a sheet, by striking a pin against the ribbon to produce its impression on the paper. Dot matrix printers are used to produce multipale copies of a print out, as the striking motion of the pins helps in making carbon copies of atext also ..
Shows a dot matrix printer.

Friday, 16 August 2013

Basic Concept OF Operating System

An operating system is a set of instructions stored on a storage device such as hard disk, Compact Dist  Read Only Memory (CD ROM) or floppy disk . When you switch on a computer , the power on routing activates and a set of a power -on routine activities is performed . These power -on routine
activities verify the devices attached to the CPU , such as keyboard, hard disk, floppy disk. CD ROM and printers for their proper functioning. The instructions for these power-on routine activities are stored in the
Read Only Memory is permanent in nature and stores the data even when the power is switched off.
However, ROM stores only few kilobytes of  instructions due to its finite size . AS a result , the power -on
routine activities are stored permanently in the hard disk as operating system, and are transformed from the hard disk into the Random Accese Memory (RAM) on booting the computer system