| Subject | Chinese | English |
| commun., railw. | 运营、管理和维护 | Operation, Administration and Maintenance |
| telecom. | 运营,管理和维护 | operations, administration and maintenance |
| telecom. | 运营,管理和维护中心 | operations, administration and maintenance center |
| telecom. | 运营,管理,维护和提供 | operation, administration, maintenance and provisioning |
