| Subject | English | Japanese |
| nucl.phys. | anticipated operational occurrence | 予測運転事象 |
| therm.energ. | arc furnace operational switch | アーク炉運転スイッチ |
| therm.energ. | arc furnace operational switch | アーク炉操作スイッチ |
| abbr. | n operational amplifier | オペアンプ |
| comp. | n operational amplifier | 演算増幅器 (enzan-zōfukuki) |
| reliabil. | operational availability | 運用アベイラビリティ |
| phys. | operational calculus | 演算子法 (enzanshihō) |
| nucl.phys. | operational conditions of equipment | 動作状態 機器の |
| gen. | n operational costs | 運転費 (untenhi) |
| comp., MS | operational database | オペレーション データベース (A SQL Server 2008 database, by default named OperationsManager, which stores configuration data, operations data, and security data) |
| gen. | n operational death | 術中死 |
| tech. | operational delay | 運転遅 (うんてんおくれ) |
| gen. | n operational error | 操作ミス |
| gen. | n operational expense | 作業費 |
| gen. | operational freeboard | 操作余裕高 |
| IMF. | Operational Guidelines for the Data Template on International Reserves and Foreign Currency Liquidity | ン |
| IMF. | Operational Guidelines for the Data Template on International Reserves and Foreign Currency Liquidity | 外貨準備と外貨の流動性のデータテンプレートの運用ガイドライ |
| gen. | operational indicator | 運転指標 |
| electr.eng. | operational insulation | 機能絶縁 |
| el., sec.sys. | operational intertripping | 無条件転送連携トリップ |
| comp., MS | operational log | 操作ログ (A log that contains information about operations carried out by a computer in the process of executing a program) |
| gen. | operational planning | 作業計画 |
| gen. | n operational precision | 演算精度 |
| gen. | n operational procedure | 作業手順 |
| gen. | n operational risk | 運用リスク |
| gen. | operational route length | 運行距離 |
| law | operational rules | 業務規程 |
| tech. | operational sequence diagram | オペレーショナル•シークエンス•ダイアグラム |
| tech. | operational sequence diagram | オー•エス•ディー |
| comp. | n operational sign | 演算符号 |
| gen. | operational site staff | 現場操作員 |
| gen. | operational space | 運転領域 |
| gen. | operational specification | 作業規定 |
| gen. | operational system design | 運用システム設計 |
| el., sec.sys. | operational tripping | 連携トリップ |
| comp., MS | operational workflow | 操作ワークフロー (A workflow that is synchronous and starts immediately) |
| comp., MS | post-operational workflow | 事後操作ワークフロー (A workflow that is asynchronous or that starts at a later time, but does not have to wait for a previous workflow to finish) |
| gen. | adv pre-operational | 使用前 |
| law | statement of operational procedures | 業務方法書 |
| el.gen. | system operational diagram | 系統運用図 |