| Subject | English | Chinese |
| tech. | call direction code | 指定收信人住址代码 |
| space | call direction code | 调用方向码 |
| gen. | call direction code | 呼叫方向码 |
| avia. | code direction character | 代码定向符号 |
| telecom. | direction code | 路由码 |
| telecom. | direction code | 方向码 |
| comp., MS | direction code | 方向碼 (A value in a fax or phone activity that indicates the direction of the message. Typically the values are incoming or outgoing) |