V$PARAMETER

Columns
   ___________________________
 
   ISSYS_MODIFIABLE
   ISMODIFIED
   VALUE
   ISSES_MODIFIABLE
   ISDEFAULT
   ISADJUSTED
   NUM
   NAME
   TYPE
   DESCRIPTION

Related Views:

V$NLS_PARAMETERS 
V$NLS_VALID_VALUES 
V$SYSTEM_PARAMETER 
V$PARAMETER2