LOW-COST COMPUTER GRAPHICS FOR THE MANUFACTURING ENVIRONMENT HAVE BEEN AN ENABLING TECHNOLOGY FOR MANY SOFTWARE SOLUTIONS TO MANUFACTURING CHALLENGES. WHAT USED TO REQUIRE A LARGE (AND EXPENSIVE) DEDICATED COMPUTER CAN NOW BE ACCOMPLISHED ON AN EFFICIENT AND LOW-COST PERSONAL COMPUTER (PC). BUT WITH FEW EXCEPTIONS, MANUFACTURING SOFTWARE FOR THE PC HAS BEEN STRUCTURED AFTER APPLICATIONS WRITTEN FOR LARGER SYSTEMS. AND, SOFTWARE FOR LARGER SYSTEMS HAS ROOTS IN OLDER TECHNOLOGIES, BEFORE COMPUTER GRAPHICS WERE AVAILABLE. THIS PAPER DISCUSSES THOSE ROOTS, AND PRESENTS A NEW WAY TO CREATE, MANUFACTURING TOOL PATHS FOR NC AND CNC MACHINES. THIS METHOD IS CALLED MANUFACTURING PROCESS MODELING AND REPLACES THE TRADITIONAL NC PROGRAMMING.