What to use to view data

[wizard111]

I found one of my back up CD with futures data on it that I use maybe years ago. However i do not know what to use to view the data. The CD directory structure is :

Future Index

C_ADJ C_NADJ C_YADJ C_YNADJ

(under these 4 directory there are directories
- and A thru Z directories

under C_ADJ the file extention is CBA (ie C_ADJ\C\C.CBA)
under C_NADJ the file extention is CNA (ie C_NADJ\C\C.CNA)
under C_YADJ the file extention is CYA (ie C_YADJ\C\C_H.CYA)
under C_YNADJ the file extention is CYN (ie C_YNADJ\C\C_H.CYN)

Do anyone recognise these files and could please tell me what to use to view these files?

Thanks
Calvin