I have come to the conclusion that much of our the information/data that we own, is actually not ours. Whether files that we have purchase (e-books, songs etc...) or information that we have created (word documents, spreadsheets and presentations). We can only access them through applications running on the computer that these files "live" on.

I know that this has happened to you.  You are sending out an email and Outlook (or whatever mail program you use) decides to "help" you and after you type in a couple of letters it fills in the blank for you.

This is called auto-completion.  Quite often this is a helpful feature.  There are, however, times when auto-completion can have unintended results, results that, at best can amount to humorous faux pas between friends and at worst can cause sensitive information to be disclosed to the wrong party.