Microsoft Office comes in a wide array of versions, from Office 365 to full-blown downloadable apps, to variations of each. It’s hard to know which one is best for your needs. If that’s the case for you, don’t worry, the New York Times is here to help.
From the article:
If you are looking for the least expensive way to get the Microsoft Excel spreadsheet program, the company includes a free browser-based version of the software in its Office Online collection. To use Excel Online, you need to sign in with a free Microsoft Account, or an account assigned to you by your school or employer.