Module source naming schemes

I'm starting to build module source files, which I compile then
create a service program with.  Each module source file will have
a prototype file.  

What type of a naming scheme should I have?

I have some functions that would serve one application called Cartage,
so I'm thinking along the lines of CARTAGEMOD and CARTAGEPR for those.
Or should I go with MODCARTAGE and PRCARTAGE ?

And then I have some general utilities, such as my StampToHHMM and
StampToCYMD routines, which take date/time stamps as input and return
hours and minutes, or CCCCYYMMDD. Should I make a separate module for
these and call it, what, MODDATTIM or DATTIMMOD ?

Then I have one called RtvNetF which will Retrieve a user's list of
waiting network files one at a time ('F' for first call, 'N' for next
call, 'C' to close and set on LR).  What would I call this one?  MODSYSTEM
or SYSTEMMOD ?

And then I want to stick this whole thing in one service program, which
I would call, what, ICSSERVICE ?  

What naming schemes has everyone else settled on?  So far there are no
modules on the system at all, nor are there any service programs, so whatever
naming schemes I start with we will most likely go with.

Any suggestions appreciated.

Regards,

Jim Langston
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