All core routines have been written entirely in Assembler Language by Hardware Design Engineers (not utility programmers). CIRCAD boasts the highest run-time performance of any PCB CAD package on the market today. Schematics, netlists, circuit boards, and gerber plots are all at your fingertips awaiting your beck and call. For the more advanced users, CIRCAD even has a "reverse engineering" feature that enables you to start with a scanned image of a PCB and work backwards to the schematic.