Hi, As far as Microchip PICmicro ASM coding conventions are concerned, is the following example the proper way to signify the difference between 'Microchip-standard include files' and 'user-defined header files'?: Use angle bracket format for *system standard* include files: #include Use quote format for *user-defined* include files: #include "MATH.inc" I know that this question may sound silly to some, but I'm always striving to do things the proper way and follow conventions. MPASM User's Guide with MPLINK and MPLIB lists both methods, but I do not see an explanation on why you should one method over another. I realize that either way works just fine (and I'm not trying to split hairs), but just wanted to see if this is a widely accepted standard (I was taught when learning C++ that the 'angle bracket' include format is used for system-inherent includes and the 'quote' include format is used for user-defined includes). I figured this rule probably applies to other languages as well, but I could be wrong. Thanks very much for your time. Best regards, Ken Pergola -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.