How does facebook (and myspace) do this....?

[eluser]flyenig[/eluser]
When you register on facebook or myspace, or u go to settings and u want to select your school,
They use a jquery autocomplete that has a list of every school.

Or when you want to select a city, and you start typing your city, the autocomplete shows up with the cities.

Are they storing all the cities, schools, countries, etc in a Database or are they getting it from some kind of API or something?

becasue im trying to implement something like this in my project.


Thanks