Basics- Oracle Access Manager (OAM), Oracle Identity Manager (OIM)

Oracle Access Manager (OAM)Oracle Access Manager is a J2EE application typically deployed on a dedicated managed server in a Weblogic (Application Server) clustered environment.
An enterprise typically has many applications for different purposes. Each application typically has its own authentication and authorization functionality. All resource grants in an enterprise in OAM have  multiple applications exist on different platform.OAM provides:

• Single Sign On (SSO)

• Authentication

• Authorization

• Real time session management

• Auditing

• Policy Administration

• Effective Security

• Cost

• Inconsistence

• Security Complainces

• Ease for users (Single Sign On)

• Governance, Support and Management

OIM does life cycle management of an identity (generally a user, e.g employee).OIM server is a J2EE application. User provisioning is done in OIM. The OIM integrates this with all the other applications.
All application have their *own* authentication and authorization mechanism.