Errors And Omissions Insurance - E&O
  
Errors and omissions insurance, or E&O, is insurance companies can get in case they mess up real badly with a client. The bigger the company, the higher the chances are that something could go wrong with a client.
It only makes sense then that a company would get E&O to protect their workers, and therefore themselves, since most things don't go as planned in life.
E&O insurance covers court and settlement costs (up to a predetermined amount) for P.O'd clients.
Hey, stuff happens.