The RDOINI file is a startup file for RDO.  You can include RDO
 statements in this file to set up the characteristics of your
 terminal session, set the default data dictionary directory, invoke
 databases, and perform other frequently used operations.  If you
 define the logical name RDOINI to point to a centralized
 initialization file, RDO uses this file as a startup file.
 Otherwise, RDO looks for a file called RDOINI.RDO in the current
 default directory.

 $ TYPE STARTUP.RDO
 INVOKE DATABASE PERS = PATHNAME 'PERSONNEL'
 SHOW DATABASES
 $ DEFINE RDOINI "DISK2:[OBRIEN]STARTUP.RDO"
 $ RDO
 Database with db_handle  PERS   in file  PERSONNEL
 RDO>