Office 365 is a cloud-based collection of Microsoft applications, which can be accessed using any web browser on almost any device. The applications include Outlook (email), OneDrive (file storage/sharing), Word (word processing), Excel (spreadsheets), PowerPoint (presentations), OneNote (digital notebook), and Teams (collaboration tools), as well as several other specialized apps. Users can download up to five copies of Office 365 to Windows and/or Mac OS devices, as well as on mobile devices using iOS and Android.