The FIX Protocol and Finance
Wall street pays my bills.
This is the sort of crap I'm doing on a daily basis. ;^)
I'm not kidding when I tell you that understanding that protocol and its basic workflows (along with some basic knowledge of trading and good Linux sysadmin skills) makes it almost trivial to get a good salary in New York.http://en.wikipedia.org/wiki/Financial_Information_eXchange