Interdata_v6/usr/sys/print

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including files from this version of Unix. 
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echo 
pr \
param.h \
buf.h \
conf.h \
file.h \
filsys.h \
ino.h \
inode.h \
proc.h \
reg.h \
seg.h \
selch.h \
systm.h \
text.h \
tty.h \
user.h
pr \
dump.s \
long.s \
low.s \
sdev.s \
start.s \
trace.s
pr *.c