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| Subject | English | Thesaurus |
| telecom., abbr. | Core Aspects of the Link Access Procedure to Frame Mode Bearer Services | LAPF-Core (FR, ISDN) |
| avia., amer. | DF approach procedure | A procedure used under emergency conditions where another instrument approach procedure (IAP) cannot be executed. DF guidance for an instrument approach is given by ATC facilities with DF capability. |
| telecom., abbr. | Link Access Procedure to Frame Mode Bearer Services | LAPF (FR, ISDN) |
| abbr., file.ext. | Programme Evaluation Procedure | PEP |
| abbr. | Remote Procedure Call service | RPC service (ssn) |
| abbr., mil., WMD | Standard Program Procedure | SPP (s) |