Facebook equity on many markets?

[Eric Ndoukoue]

Hi,

I was doing a research on finance.yahoo.com about Facebook equity and found out that the company is registered on many markets: as facebook inc on Nasdaq, but also as facebook-A on many other markets in Germany like XETRA, Frankfurt, Hamburg, Dusseldorf, just to name a few (symbols = FB2A.X, with X representing the different Germany cities). Each has a different quote.

What does this mean? Does this mean Facebook actually has many quotes and its real quotation is the sum of all of these, or is it a technical thing?

I have to admit that i am illiterate as to investing so please forgive me if my questions are a little simple. Can you please help me understand the basics on quotes on different marketplaces, with company,inc and company-As?

Thank you