SQL: Structured Query Language - Oracle 10g Database Administration Concepts and Implementation Made Simple - page 76

DMSYS: Oracle Data Mining account. DMSYS performs data
mining operations.

OLAPSYS: Oracle OLAP account. It owns the OLAP Catalog.

ORDPLUGINS: Oracle interMedia account

ORDSYS: Oracle interMedia administration account

OUTLN: Perfomance tuning account to store information to
support plan stability

SCOTT: Sample database schema.

SYS: This account is used to perform database administrative
tasks. The default password of this account is

CHANGE_ON_INSTALL.

SYSMAN: This account is used to perform Oracle Enterprise
Manger database administrative tasks. SYS and SYSTEM are
having the same power to perform such tasks. The default
password of this account is CHANGE_ON_INSTALL.

SYSTEM: Another account for performing database
administrative tasks. The default password of this account is
MANAGER.

Things to Remember Before Moving Ahead

1) Understanding the difference between three terms: SQL,
PL/SQL, SQL*Plus .
2) Oracle Instance receives these commands from
connected users.