The zipped files 1_4.ZIP etc are Toronto RCPM (later Canada Remote Systems)
user disks. The LST files list their contents (not very adequately for the 
early ones, better for the later ones). The CDIR subdirectory lists the 
content of the CP/M file section of CRS shortly before it was deleted in 1992. 
Miscellaneous ARC and LBR files downloaded from this section are in the FILES
subdirectory. 