| Subject | English | Japanese |
| gen. | n backup band | バック・バンド |
| gen. | n backup band | バックバンド |
| comp., MS | backup battery | バックアップ バッテリ (An additional battery source available in Windows Mobile powered devices. It avoids data loss if the primary battery loses power) |
| comp. | n backup battery | バックアップ・バッテリ |
| comp. | n backup battery | バックアップバッテリ |
| comp., MS | backup copy | バックアップ コピー (A duplicate of a program, a disk, or data, made either for archiving purposes or for safeguarding files) |
| comp. | n backup copy | バックアップ・コピー |
| comp. | n backup copy | バックアップコピー |
| comp., MS | backup designated router | バックアップ専用ルーター (An OSPF router that forms adjacencies with all other routers on a multiple access network and becomes the designated router when the designated router becomes unavailable) |
| comp., MS | backup device | バックアップ デバイス (A tape or disk drive containing a backup medium) |
| gen. | n backup device | マジコン from マジックコンピューター |
| comp. | n backup diskette | バックアップ・ディスケット |
| comp. | n backup diskette | バックアップディスケット |
| comp., MS | backup domain controller | バックアップ ドメイン コントローラー (A domain controller (DC) that receives a copy of the domain directory database from the primary domain controller (PDC). There is only one PDC or PDC emulator in a domain and the rest are backup domain controllers) |
| construct. | backup electric generator | バックアップ発電機 (ばっくあっぷ・はつでん・き) |
| comp., MS | backup file | バックアップ ファイル (A duplicate of a program, a disk, or data, made either for archiving purposes or for safeguarding files) |
| comp. | n backup file | バックアップ・ファイル |
| comp. | n backup file | バックアップファイル |
| gen. | n backup light | バックアップライト |
| light. | backup light | 後退灯 (kōtaitō) |
| gen. | n backup light | バックアップ・ライト |
| gen. | n backup light | バック・ライト |
| gen. | n backup light | バックライト (bakku-raito) |
| gen. | backup measure | 辷り止め |
| gen. | backup measure | 滑り止め news2 nf37 (すべりどめ) |
| comp., MS | backup media pool | バックアップ メディア プール (A logical collection of data-storage media that has been reserved for use by Microsoft Windows Backup. Backup uses Removable Storage to control access to specific media within a library) |
| comp., MS | backup medium | バックアップ メディア (Disk file or tape used to hold one or more backups) |
| comp., MS | Backup Operators group | Backup Operators グループ (A type of local or global group that contains the user rights you need to back up and restore files and folders. Members of the Backup Operators group can back up and restore files and folders regardless of ownership, permissions, encryption, or auditing settings) |
| gen. | n backup power | 非常用電源 (ひじょうよう・でんげん) |
| gen. | n backup power supply | バックアップ電源 |
| el., sec.sys. | backup protection | 後備保護 |
| comp., MS | Backup Recovery Migration tool | バックアップ復元移行ツール (A command line utility that is used to backup and restore print configuration and items (print queues, drivers, print processors, etc) during a print migration) |
| gen. | backup roll | 支持ロール |
| comp. | n backup route | バックアップ・ルート |
| comp. | n backup route | バックアップルート |
| comp., MS | backup server | バックアップ サーバー (A computer on which Host Integration Server 2004 stores the configuration file. If the primary server ever goes down, HIS loads the copy of the configuration file from the backup server. One or more computers can operate as backup servers at any given time) |
| comp., MS | backup set | バックアップ セット (A collection of files, folders, and other data that have been backed up and stored in a file or on one or more tapes) |
| comp. | n backup set catalog | バックアップ・セット・カタログ |
| comp., MS | backup set catalog | バックアップ セット カタログ (A summary of the files and folders that have been saved in a backup set) |
| comp. | n backup set catalog | バックアップセットカタログ |
| comp., MS | backup shadow copy | バックアップ シャドウ コピー (A shadow copy of a replica created by the DpmBackup command-line tool. In DPM, backup shadow copies are used to archive replicas to tape) |
| comp. | n backup snapshot | バックアップ・スナップショット |
| comp., MS | backup snapshot | バックアップ スナップショット (A snapshot of a site's data, created by the Backup Configuration Manager Site Server task or by another backup utility. The backup snapshot is used during a site recovery process to restore the site's data) |
| comp. | n backup snapshot | バックアップスナップショット |
| gen. | n backup system | バックアップ・システム |
| gen. | n backup system | バックアップシステム (bakku-appu-shisutemu) |
| gen. | n backup unit | 予備装置 |
| comp., MS | backup withholding | 予備源泉徴収 (An IRS tax rule in the United States that requires notified payers to withhold a set percentage from payments made to payees who cannot be identified due to missing or incorrect taxpayer identification numbers on tax forms) |
| el., sec.sys. | circuit local backup protection | 自端入力後備保護 |
| el., sec.sys. | remote backup protection | 遠端後備保護 |
| el., sec.sys. | substation local backup protection | 自所入力後備保護 |