These files are the domain name server for CMU TCP/IP which were left off some copies of the Fall 1992 L&T tapes inadvertently. Note that on installing these, you want a line in INTERNET.CONFIG that looks something like: WKS:53:DOMSSV:TCP$DOMSSV:NETWRK:NETMBX,TMPMBX,PHY_IO,SYSLCK:::::4:5 (in other words with more ":" characters than the domain server doc says). If you got the Fall '92 tapes and the CMU tcp/ip was in a ZIP file, the VMS attributes of the savesets were not stored (the zip command was done wrong). The savesets are however OK. Just use the FILE utility to repair the attributes. The command is something like $file/type=fixed/record=32256/attr=noimpliedcc *.a $file/type=fixed/record=32256/attr=noimpliedcc *.b $file/type=fixed/record=32256/attr=noimpliedcc *.c $file/type=fixed/record=32256/attr=noimpliedcc *.d $file/type=fixed/record=32256/attr=noimpliedcc *.bck (If the "32256" record length is wrong and Backup complains, use backup/list to show the correct record length and use that instead.)