| Subject | English | Chinese |
| telecom. | legacy system | 继承系统已存在的系统,不易与新系统兼容 |
| telecom. | legacy system | 数据库管理传统系统通常指单用户系统或基于终端的多用户系统 |
| libr. | legacy system | 老旧系统 |
| proj.manag. | legacy system | 旧版本系统 |
| fin. | legacy system | 遗留系统 |
| avia. | legacy system alignment | 传统系统调整 |
| el.com. | legacy system integration | 遗留系统集成 |
| el.com. | legacy system integration provider | 遗留系统集成供应商 |
| law | uniform legacy system | 单一继承制 |