The library INGLIB contains routines that permit a Fortran program to access data INGRES tables. On-line help is available by doing $ HELP INGLIB.
The library LOCUSLIB exists for accessing LOCUS ISAM data. See either the on-line file TFTR_EXAMPLES:LOCUS_ISAM_RW* or print USR:[LOCUS] LOCUS.DOC, the LOCUS ISAM document, both of which contain a sample program and the subroutine descriptions.