If you have a gmail account, it comes with Google Docs. You can log-in to Google Docs using you gmail account username and password.
Google Docs is like Microsoft Office. You can compose documents, make spreadsheets, create presentation, make forms and you can also draw.
You can also save all your finished documents within Google Docs. When you open your Google Docs, let us say, at computer shop, you can still access your work. It also has "Collections". This is the equivalent of file folders.
I made a simple guide for Google Docs, but I just used Spreadsheet for my example.
How to Use Google Docs