select NAME, DESCRIPTION from v$bgprocess

NAME DESCRIPTION
PMON process cleanup
DIAG diagnosibility process
FMON File Mapping Monitor Process
LMON global enqueue service monitor
LMD0 global enqueue service daemon 0
LMS0 global cache service process 0
LMS1 global cache service process 1
LMS2 global cache service process 2
LMS3 global cache service process 3
LMS4 global cache service process 4
LMS5 global cache service process 5
LMS6 global cache service process 6
LMS7 global cache service process 7
LMS8 global cache service process 8
LMS9 global cache service process 9
DBW0 db writer process 0
DBW1 db writer process 1
DBW2 db writer process 2
DBW3 db writer process 3
DBW4 db writer process 4
DBW5 db writer process 5
DBW6 db writer process 6
DBW7 db writer process 7
DBW8 db writer process 8
DBW9 db writer process 9
DBWa db writer process 10 (a)
DBWb db writer process 11 (b)
DBWc db writer process 12 (c)
DBWd db writer process 13 (d)
DBWe db writer process 14 (e)
DBWf db writer process 15 (f)
DBWg db writer process 16 (g)
DBWh db writer process 17 (h)
DBWi db writer process 18 (i)
DBWj db writer process 19 (j)
ARC0 Archival Process 0
ARC1 Archival Process 1
ARC2 Archival Process 2
ARC3 Archival Process 3
ARC4 Archival Process 4
ARC5 Archival Process 5
ARC6 Archival Process 6
ARC7 Archival Process 7
ARC8 Archival Process 8
ARC9 Archival Process 9
LNSV Network Server
LGWR Redo etc.
LCK0 Lock Process 0
CKPT checkpoint
MRP0 Managed Standby Recovery
LSP0 Logical Standby
LSP1 Dictionary build process for Logical Standby
SMON System Monitor Process
RECO distributed recovery
CJQ0 Job Queue Coordinator
EMN0 Event Monitor Process 0
QMN0 AQ Time Manager Process 0
QMN1 AQ Time Manager Process 1
QMN2 AQ Time Manager Process 2
QMN3 AQ Time Manager Process 3
QMN4 AQ Time Manager Process 4
QMN5 AQ Time Manager Process 5
QMN6 AQ Time Manager Process 6
QMN7 AQ Time Manager Process 7
QMN8 AQ Time Manager Process 8
QMN9 AQ Time Manager Process 9
DMON DG Broker Monitor Process
RSM0 DR Resource Manager Process
NSV0 DR Server NetSlave Process 0