Oracle E-Business Suite Documentation for R12

Documentation Sources

Oracle Application concepts
Major E-Business Suite Product Families
Oracle Applications Multiple Organizations Implementation Guide
Oracle Applications Flexfield guide
Oracle Applications System Administrator's Documentation set
Oracle Applications User Guide
Oracle Self Service Web Applications implementations Manual
Oracle Workflow guides
Oracle Business Intelligence documentation

Additional information regarding the E-Business Suite product families can be found at the following links:

Financials : http://www.oracle.com/applications/financials/intro.html
Human Resource Management : http://www.oracle.com/applications/human_resources/intro.html
Supply Chain Management : http://www.oracle.com/applications/scm/intro.html
Customer Relationship Management : http://www.oracle.com/applications/crm/intro.html
Projects : http://www.oracle.com/applications/projects/intro.html
Procurement : http://www.oracle.com/applications/procurement/intro.html

Other Resources

MetaLink: MetaLink is the official Customer Support Site provided by Oracle. Single Sign on is currently established by Oracle which ensures that the login and password is the same across their resource portals.
Requires you to have a CSI or Customer Service ID in order to login to this resources
Create Service Requests
Upload patches and updates
Search for Information
Submit information
Link -> http://metalink.oracle.com/

AppsWorld : This is a hands on learning environment full of innovative technology being showcased, along with some training, education and strategy workshops. This is held once a year and additional information could be obtained at http://www.oracle.com/openworld/index.html

Appsnet : AppsNet is an online community for users and implementers of Oracle Applications and you can join for free. This source includes
Product family video presentations
> - Release 11i documentation set
> - Release 11i product overviews
> - Release 11i white papers
> - Release 11i upgrade information
> - Product eSeminars
> - Product demonstrations
> - Self-service access to technical and functional information
> - Implementation and usage tips for Oracle's E-Business Suite
> - Over 20 discussion forums for you to interact with your peers

Oracle Technology Network : Comprehensive Technical resource, Free Membership. Typical users who will find this informaiton source useful are Java Developers, Database Administrators & Developers, System Administrators & Developers, Solution Architects.
Link -> http://www.oracle.com/technetwork/index.html