Oracle Database Online Documentation
10g Release 2 (10.2)
These books provide background information for new users:
These books contain the most commonly used information for general database administration and application development:
If you are familiar with earlier Oracle releases and are moving to Oracle Database 10g, these books describe the new features, and explain how to upgrade your database.
Information about how various technologies included in Oracle Database are licensed are described in the the licensing guides.
READMEs and Release Notes
Documentation errata are in the README. Extra installation information for each platform is in the Release Notes.
Installation guides describe how to install Oracle Database on various platforms and operating systems.