Microsoft’s Office Web Applications are browser-based Office clients which include Excel, OneNote, PowerPoint, Word and also Outlook. The Office Web Applications can be accessed by simply opening the documents as listed on a web page.
Users will have access to, and can use Microsoft Office to edit/modify Office documents anywhere.
Here is the screenshots of Office Web Applications
Excel Office Web Application

Excel Office Web Application in FireFox

OneNote Office Web Application

PowerPoint Office Web Application

Word Office Web Application

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