http://www.ibm.com/systems/i/infocenter/
The IBM i Information Center contains advisors and important topics such as CL commands, system application programming interfaces (APIs), logical partitions, clustering, Java™ , TCP/IP, Web serving, and secured networks. It also includes links to related IBM Redbooks and Internet links to other IBM Web sites such as the Technical Studio and the IBM home page.
The manuals that are most relevant to the ILE COBOL compiler feature are listed in the Bibliography.