2 - names of system call routines may clash with user routines
3 - some modules in Pascal?
4 - ttyio, stdio, pasio, unixio
5 - mention all external references
6 - list of routines and partitioning
7 - size of sizes in asz,bcp,dis,new,opn,pac,unp: int or long ?
10 The run files in mach/*/libpc show the actual usage of this