Information Technology for The World - How does The Oracle Corporation make so much money?

How does The Oracle Corporation make so much money?

Oracle is a multi-billion dollar corporation and I want to know where all this revenue is coming from.

Oracle is a software and consulting company. They make money making the software and then sell backend services through support and implementation of the software. There's a lot of money in software...look at Bill Gates.
Money laundering for third world dictators.... on a more serious note, they sell Databases and database tools to a lot of large corporations. They also own other enterprise software platforms such as Siebel
On Annual maintenance of the softwares that they sell.
databases for enterprises applications such as their oracle 11.0i sells for quite a bit of money. With other add-ons and renewals of the licenses to use their softwares add billions to their sales/revenue.. Of ERP softwares, Oracle and SAP are are two largest multi-Billion $$ comopanies.