Creating db from sql script file - Mailing list pgsql-novice

I have worked with MSSql for awhile and one of the most convienent features of the Enterprise Manager is the "export
sqlto file" 
function. I am new to postgres and wondering if postgres supports this. The main reason is I use a dev. box and a live
box.If I make the changes on the dev box, can I export the sql and transfer it to the live box? Not to mention, when
thedatabase is created it would be nice to export the sql to have a hard copy. 

Is there an export/import sql feature? I have not been able to find it.

Thanks