Information may come from within Entourage or outside the program. With Entourage 2004, Microsoft began offering a Project Center, which allows the user to create and organize projects. Its personal information management features include a calendar, address book, task list, note list, and project manager. Microsoft Entourage is an email application. It was originally a competitor to the dominant Lotus 1-2-3, but it eventually outsold it and became the de facto standard for spreadsheet programs. Like Microsoft Word, it possesses a dominant market share. Microsoft Excel is a spreadsheet program. However, it is also supported on Office 2004 with the help of a free conversion tool available from Microsoft. The new Office Open XML format was built into the next version of Office for Mac (Office 2008). DOCX, but has the capability of saving and opening the old. Its proprietary DOC format is considered a de facto standard, although its successive Windows version (Word 2007) uses a new XML-based format called. Microsoft Word is a word processor which possesses a dominant market share in the word processor market. The Student and Teacher Edition is not eligible for upgrade, which means if a later version of Office is installed, a full package license will be required. The Professional Edition includes Virtual PC. All three editions include Word, Excel, PowerPoint and Entourage. Microsoft Office for Mac 2004 is available in three editions: Standard, Professional, and Student and Teacher. Support for Office 2004 ended January 10, 2012. Microsoft ultimately shipped support for Visual Basic in Microsoft Office 2011 for Mac, which also dropped PowerPC support altogether. However, Office 2008 did not include support for Visual Basic for Applications, which made Microsoft extend the support period of Office 2004 from Octoto January 10, 2012.

Office 2004 was replaced by its successor, Microsoft Office 2008 for Mac, which was developed as a universal binary to run natively on Intel Macs. For this reason, it is not compatible with Mac OS X 10.7 and newer.

The software was originally written for PowerPC Macs, so Macs with Intel CPUs must run the program under Mac OS X's Rosetta emulation layer. It is equivalent to Office 2003 for Windows. Microsoft Office 2004 for Mac is a version of Microsoft Office developed for Mac OS X.

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