Microsoft Office helps people create professional looking content by combining a comprehensive set of Microsoft tools with easy to use applications. Microsoft Office is a collection of desktop programs that run on the Microsoft Windows or the Mac OS X operating system. These programs are designed to simplify a number of everyday business and home computing tasks that users need to perform. Each version of Microsoft Office is typically split into several different editions. Microsoft Office allows users to create and maintain databases, create and edit typewritten documents, design websites, design electronic presentations, create spreadsheets and perform a number of other similar tasks. Each edition of Microsoft Office has a different set of programs, but these programs typically include Microsoft Access, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint and/or Microsoft Word. The MOS certification validates a candidate’s proficiency in Microsoft software for office productivity, including Word, Excel and PowerPoint. These word processing, spreadsheet and presentation programs are tools used most commonly by those who work in offices. An administrative assistant or an office administrator, for example, benefits from MOS certification because they may frequently use Office programs to compose written correspondence using word processing and e-mail programs, as well as analyze and present data using spreadsheets. Typists may also use these Microsoft programs frequently, setting up and preparing business reports, letters, mailing labels and other text. MOS certification demonstrates these workers can complete these tasks in an efficient and timely manner.