| _BFA_acb | Balloon Flight Allocation Control Block |
| _BFA_rcb | Underlying ring buffer |
| _BFC_msg | A standard BFC message |
| _BFC_msgDst | Defines a BFC message destination |
| _BFC_msgStream | Defines a BFC message stream |
| _BFC_rto | Defines a BFC run timeout control structure |
| _BFC_runCtl | Encapsulates the information needed to control a run |
| _BFC_runInfo | The publically defined portion of the run control structure |
| _BFI_gsc | Group service context |
| _BFI_gscList | Collection of all group service contexts |
| _BFI_ssc | System Service Context |
| _BFM_dsc | Captures all information about the TEMs and FPGAs |
| _BFM_opStatus | Captures the status of a given operation |
| _BFO_biu | Defines the parameters which control writing a sampled stream of events to the BIU |
| _BFO_biuDst | Defines an BIU destination control structure |
| _BFO_dsk | Defines the parameters which control writing a disk file |
| _BFO_msg | Defines the contents of a message passed between the FORK tasks |
| _BFO_ocb | The Output Control Block |
| _BFO_stats | Defines an IO statistics block |
| _BFO_statsRec | Defines an IO statistics record |
| _BFR_lst | List head for the various readout types |
| _BFR_rod | Describes and controls an object to be readout |
| _BFR_roi | Defines a readout image |
| _BFR_rop | Defines a readout program |
| _BFR_ros | Describes the synchronization structure |
| _BFT_trg | Structure to contain information related to triggering |
| _BFU_fileDsc | This provides a description of a list of records |
| _BFU_recDsc | This provides a simple description of a record |
