This directory contains 1) Various DEC programs, which will boot in TS DEC if they are run 2) The files that DEC programs expect on the SYS: device. if a DEC program opens SYS:, it really looks on this directory. 3) The DEC emulator source(MC only), binary, and pure dump (TS DEC). 4) The DEC bootstrap (DECBOT BIN). If you have a DEC program in core, do $$1L DECSYS;DECBOT BIN 46$9B to arrange for the DEC program to be ^K'able directly (it will load in and start TS DEC). If you created the core image using DECUUO, this is not necessary. Use :PDUMP instead of $Y. - MRC