Microsoft Office is the market-leading office software from Microsoft and is executable under the Microsoft Windows and Mac OS X operating systems. Microsoft Office essentially consists of the programs Microsoft Outlook for e-mail and task planning, Microsoft Word for word processing, Microsoft Excel for spreadsheets, Microsoft Access for database management and the presentation program PowerPoint, which can also be run individually. Depending on the edition, the DTP software Microsoft Publisher is also part of the Office package. In addition to the various Office products, this section also presents extensions such as templates or Excel generators, but also Excel readers for AS/400.