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System Software | Device Drivers | Part - 2

Device Driver is a software & this is a type of system software. Driver are need for all the hardware installed in the computer because these drivers help to connect the hardware to the operating system, Without drivers the operating system will not give any commands. "The Driver acts like a bridge between the O/S & Hardware" Which Devices need Drivers : All hardware devices that are unknown to the operating system or Components that the operating system does not understand, drivers are need for them. Some device drivers come with hardware which is available in the CD & Some hardware requires drivers to be downloaded from the internet.  List of hardware device that require drivers : Card Reader Modem Motherboard Chipset Printer Web Cam Wi-fi Adapter Scanner Controller USB Devices Video Card Sound Card Which Devices not need Drivers : Nowadays, many drivers come in the operating system, due to which some hardware does not require drivers tha...
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what is html-full introduction?

Html stand for hyper text markup language! which is the most widely used language on the Web HTML created by Berners-Lee in the 1991,html standard version publish in the 1995 and major version of HTML 4.01 publish in 1999 and today we use the HTML 5 which released in 2014.

 Html is the backbone of the web pages. It provide the structure it is the setup the codes and tags which are most easily interpreted by the web browsers and main important thing it is not programming language.


  • H - hyper mean a link,which taken form the one web page to another web page.
  • T - text something you write.
  • M - Markup How you lay down the text which mean how to design the web-page by the own creativity.
  • L - Language because they needed something to complete the word. 
Html consists of a series of elements.Html elements tell the browsers how to display the content.

A simple HTML Document Structure!
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  • <!DOCTYPE html>
  • <html>
  • <head>
  • </head>
  • <body>
  • </body>
  • </html> 
<!DOCTYPE html>
  • It define the document type or it instruct the browser about the version of HTML.
  • A DOCTYPE or document type declaration is an introduction which tell the web browser about the markup language in which the current page is written.
  • The DOCTYPE is not element or tag,a DOCTYPE declaration appears at the top of  the web page before the all other elements.
  • HTML 5 there isn't any need of a reference to a document type definition (DTD) because HTML 5 is not based on Standard Generalised Markup Language(SGML).
  • HTML 5 the DOCTYPE declaration is only required for enabling the standard mode for writing document.  


<HTML></HTML>

 
  • The html tag is the starting tag of the web page.This element is the root element of an HTML page.
  • This tag informs the browser that it is an HTML document.Text between html tag describe the web document.It is a container for all the other elements of html except.
<HEAD></HEAD>
  • The head element contains meta information about the HTML page.
  • This part not visible on web page site.
  • It must be close before the body tag.
  • This tag represents the document's header which can keep other HTML tags like tittle,link,meta,script etc.

<BODY></BODY>

  • The body tag in HTML is used to define the main content present inside an HTML page.
  • This body tag contains the visible part of web page.
  • This tag contains the main content of the HTML document such as heading,paragraph,image,hyperlinks,tables,lists etc.

History Of  HTML

HTML     : 1991
HTML +   : 1993
HTML 2.0 : 1995
HTML 3.2 : 1997
HTML 4.01: 1999
HTML 5   : 2008



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