From Oracle FAQ
IOR (Initiate ORacle) was an Oracle 5 DBA utility for starting and stopping databases. IOR was later replaced with SQL*DBA in Oracle 6, Server Manager in Oracle 7 and SQL*Plus in Oracle 8i.
Initialises a new Oracle database for the first time:
Warm start an Oracle database:
Closes down an Oracle database
Like the modern "SHUTDOWN IMMEDIATE"
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