keyed file file access system

integral index index of connectivity

access file

Algorithm region of file

ASCⅡ code file of MAPGIS

automated nautical chart index file

beginning of file label

beginning-of-file label

beginning-of-file label (BOF label)

BOF Beginning – Of – File

central index file

closing of file

compaction of file record

compaction of file records

creation of file

cut of file

Data description of file

data file of figure

direct access file