ACID Atomicity, consistency, isolation, and durability. Four characteristics that a relational database must be able to maintain for transactions.
ADDM Automatic Database Diagnostic Monitor. A tool that generates performance tuning reports based on snapshots in the Automatic Workload Repository (AWR).
ADR Automatic diagnostic repository. The default location for the alert log, trace files, and other information useful for fault finding. An always-on facility that captures errors in trace and dump files the first and subsequent times they occur.
ADRCI The automatic diagnostic repository (ADR) command-line interface accessed using ...