I dreamed about clouds in college, and dreaded them. Why? I had nightmare, in which I was asked to write down equations for every cloud! I was so glad to wake up from the nightmare. Naturally, I was not going to touch the "cloud." If you use cloud, you may want to read this article:

http://www.npr.org/blogs/alltechconsidered/2014/04/25/306837205/you-love-the-cloud-but-it-may-not-be-as-secure-as-you-think