Suppose you wanted to create your own digital ghost to live for eternity in the Internet and maybe do some haunting. What would that look like?

You’d start now, backing up everything that happens on your computer to the so-called cloud (storage on the Internet). You’d run a program in the background that monitors your Facebook changes and all of your email conversations. Together with your photos, your resume, and all of your shopping and entertainment preferences, the program running in the cloud could piece together an avatar of you.