As is common in the IT world there are a huge range of acronyms related to Oracle technologies. In a viewfew regrettable cases the same acronym can mean more than one thing dependent upon context. The table below lists a few. (nb this list should ideally be sorted (or even sortable) if this can be done).

ACRONYM	MEANING	DESCRIPTION
SID	System IDentifier	Uniquely identifies an Oracle database instance
SID	Session Identifier	Identifies an Oracle Session
SGA	Shared Global Area	Shared Memory area for Oracle instance structures
PGA	Program Global Area	Private memory area for program use
OID	Oracle Internet Directory	Oracle's LDAP product
OEL	Oracle Enterprise Linux	Oracle's Linux distribution
EBS	Oracle E-Business Suite	Oracle's original application suite
DBA	Database Administrator	An Oracle database professional
DBA	Data Block Address	Address of an Oracle Datablock for access purposes.