| Subject | English | Japanese |
| comp. | n automatic system protection | 自動システム保護 |
| railw., sec.sys. | automatic train protection system | 自動列車防護システム |
| el.gen. | lightning protection system | 雷保護装置 |
| nucl.phys. | protection system of a nuclear reactor | 保護系 原子炉の |
| el., sec.sys. | protection system | 保護継電システム |
| wind. | protection system for WTGS | 保護装置 ＷＴＧＳの (hogo-sōchi) |
| gen. | safety protection system | 安全保護系 |
| comp., MS | System Protection | システムの保護 (A Windows technology that protects OS resources (files, folders registry keys) and prevents applications and administrators from making changes to a computer's resources in an arbitrary way) |