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What is OpenOffice?

                                              
OpenOffice.org is an Open Source, community-developed, multi-platformoffice productivity suite. It includes the desktop applications, such as a word processor, spreadsheet, presentation manager, formulaeditor and drawing program, with a user interface and feature set similar to other office suites.Sophisticated and flexible, OpenOffice.org also works transparently with a variety of file formats, including Microsoft Office. Languages available in OpenOffice.org_110n-* packages include: English, French, German, Spanish, Italian, Dutch, Sweddish, Finnish, Polish, Russian, Chinese, Japanese, Korean, Danish, Greek, Turkish, Czech, Catalan, Arab, Slovak. Localised help files available in OpenOffice.org-help* packages include English, French, German, Spanish, Italian, Dutch, Sweddish, Finnish, Polish, Russian, Finnish, Czech, Japanese, Korean and chinese. Spell-checking and hyphenation dictionaries are available in myspell-* and myspell-hyph-*packages, respectively.

  differences between openoffice n microsoft office                          

Article	OpenOffice.org	Microsoft Office
Interface	Similar	Similar
Easily to use	Yes	Yes (or No if users are always use the older version like 2003)
Copyright	Free to use	Can try for 30 days. If you want to use you must buy them.( costs several hundred dollars to purchase a software license)
Extension of  file saving	Same as the another (Support ODF extension)	Same as the another
Computer Specification	Medium Performance Computer can use it (Must have Java Runtime Environment to use)	Medium Performance Computer can use it. But Microsoft Office 2007 aren't recommended for low performance computer
Manufacture	Sun Microsystems Inc	Microsoft
About PDF Files	Can convert files to PDF format by itself	Must use program to convert to PDF
Compatible	Can use it in Windows, Linux, Mac(Must use X11), Solaris	Can use in Windows, Mac
Files Opening	Can't open files from microsoft office correctly	Can open files correctly
Files size	Native format is small file size	Microsoft Office's files are  bigger than OpenOffice

Programs	Offer less programs	Has more versions geared towards business
Popularity	Not that popular	Over half a billion people using it worldwide
Free online version	Not provided	Provided in Microsoft Web Apps,in 2010
Supports	in many different file types	only Microsoft Office