Proper way of refering to yourself, according to graduate level I currently have a degree as a Master in Computer Sciences, and i was always wondering on how to call myself in a more "short" manner. For example, a PhD might introduce himself as a "Doctor" to other people, but how does a MSc call himself: "Master"? "Mister"? "MSc"?. 

Talking to some PhD and MSC acquaintances, they had the same doubt about it, and i think this might be a good place to inquire about such topic, and i could not find another related question to answer myself.
According to proper etiquette you may use Master as a title (as in “Master Segovia”) if and only if you are:


the heir apparent of a Scottish viscount or baron
a boy not old enough to be called “Mr.”


The New Oxford American Dictionary (which gives the above information) also lists the archaic use as a  “title for a man of high rank or learning”, but (a) that is archaic, (b) it was not linked to a specific degree, just a courtesy title.

There is no formal title in British English or American English to designate someone who holds a Master's degree. Get over it, and earn a PhD! :)