What do the four contact types mean?

[Michau]

I noticed that for global domains, there are four types of contacts: administrative, billing, tech and organizational. I am not sure as to their meaning, so I would appreciate any help. I understand that administrative contact is the domain owner, and tech contact may be the company who registers the domain, manages the DNS and so on. But what are billing and organizational contacts, and how do they differ from administrative contact?

 

[weblord]

the organization contact (generally regarded as the "owner" of the domain), the administrative contact (the person in charge of handling administrative queries for the domain), the technical contact (the person in charge of technical issues for the domain, and making sure it "works"), and the billing contact (the person responsible for paying the registry fees, if any, for the domain).
http://support.easydns.com/new.php