The 9/15 OS did not use file extensions, so note that the
following files are imp sources files:

comp.imp
decode.imp
edit15.imp
gperm.imp
gram.imp
takeon.imp

I think all the others are assembly code source files (.asm or .src in
modern terms)
Icon  Name                    Last modified      Size  Description
[TXT] README 2008-10-12 01:43 245 [TXT] dtb.txt 2008-10-12 01:43 1.0K [TXT] xo.txt 2008-10-12 01:43 1.3K [   ] index 2008-10-12 01:43 1.7K [TXT] dti.txt 2008-10-12 01:43 1.7K [TXT] ppv.txt 2008-10-12 01:43 1.8K [TXT] lpo.txt 2008-10-12 01:43 1.9K [TXT] dto.txt 2008-10-12 01:43 2.0K [TXT] did.txt 2008-10-12 01:43 2.1K [TXT] link.txt 2008-10-12 01:43 2.3K [TXT] ppo.txt 2008-10-12 01:43 2.4K [TXT] dod.txt 2008-10-12 01:43 2.5K [TXT] dtn.txt 2008-10-12 01:43 2.5K [TXT] pri.txt 2008-10-12 01:43 2.7K [TXT] ttbam.txt 2008-10-12 01:43 2.7K [TXT] cri.txt 2008-10-12 01:43 3.5K [TXT] gram.txt 2008-10-12 01:43 4.9K [TXT] dtf.txt 2008-10-12 01:43 5.0K [TXT] sysset.txt 2008-10-12 01:43 5.1K [TXT] decode.txt 2008-10-12 01:43 7.5K [TXT] takeon.txt 2008-10-12 01:43 13K [TXT] edit15.txt 2008-10-12 01:43 15K [TXT] load.txt 2008-10-12 01:43 16K [TXT] super.txt 2008-10-12 01:43 17K [TXT] gperm.txt 2008-10-12 01:43 24K [TXT] exec.txt 2008-10-12 01:43 28K [TXT] comp.txt 2008-10-12 01:43 40K