Please try to rephrase your question in such a way that it's not complete nonsense.
"Cloud computing" is not magic. It refers to using internet-connected servers. If you're not connected to the internet, then "cloud computing" isn't going to do a darn thing for you, and it's silly to use a cloud server to surf the web in any event... they're to centralize services that require a lot of processing power and/or data storage, not for trivial computing tasks like internet browsing.
Whats serf
Your question is not entirely correct in its premise; a serf is not a slave and does not have an owner. A serf is a subject of a land owner whom the serf would address as lord.
The homonym for "serf" is "surf."
In a feudal system, a serf would remain a serf no matter how hard they were to work.
Saint Serf died in 583.
Saint Serf was born in 500.
Riddle answer: a serf board.
Peasant/serf
The plural of the word "serf" is "serfs."
The noble executed the serf.
I doubt that they thought about the serf one way or the other. The serf was to do the work and didn't require much thought from his master.
A possible antonym of serf could be "free person" or "freeman," as a serf is a person who is bound to the land and essentially owned by a lord, whereas a free person has autonomy and is not bound to servitude.