The files are:

SOURCE main source code

RAWST  state table in 'raw' form. To get a new state table INSERT CUR051.STY
       then MAKESTAB TST. This will create the following 2 files.

STTEXT state table in readable form. The symbols * and - are used for 'error'
       (should never happen) and no-action.

STAB   state table in coded form including declarations for the state,event
       and action values.

COMPILE OBEY file to compile and link TSTY, leaves a listing file TST#LIS
        and an intermediate code file TST#REL.