| CALRD | Reads calibrator source model-image FITS file |
| CALWR | writes calibrator source model images w CC files to FITS disk files |
| DATAIN | specifies name of input FITS disk file |
| DATAOUT | specifies name of output FITS disk file |
| FILEZAP | Delete an external file |
| FIT2A | reads the fits input file and records it to the output ascii file |
| FITAB | writes images / uv data w extensions to tape in FITS format |
| FITDISK | writes images / uv data w extensions to disk in FITS format |
| FITLD | Reads FITS files to load images or UV (IDI or UVFITS) data to disk |
| FITTP | writes images / uv data w extensions to tape in FITS format |
| IMLOD | Reads tape or disk files to load images to disk |
| MPDIFS | Retains comparison differences between current images and master ones |
| OLDVOL | used by READISK to specify the disk number when WRITDISK was run |
| READISK | Reads images / uv data w extensions in FITS format into AIPS |
| TCOPY | Tape to tape copy with some disk FITS support |
| TERSE | Controls the amount of information printed by the Y2K tests |
| UVLOD | Read export or FITS data from a tape or disk |
| VLBALOAD | Loads VLBA data |
| WRTDISK | writes images / uv data w extensions to disk in FITS format |
| WRTPROCS | Procedures to simplify the reduction of VLBA data |
| Y2KDISK | Specifies logical name of disk area for Y2K to read or write |
| Y2KFILE | File name of the current Y2K disk file |
| Y2KSIZE | Specifies the size of the Y2K test to be run |