how many kinds of pcb design software

                              How many kinds of pcb design software


     PCB (circuit board) design software generally contains two module:schematic design and PCB design . Now the mainstream board design software are Protel, OrCAD, Viewlogic, PowerPCB, Cadence PSD, MentorGraphices Expedition PCB, Zuken CadStart, Winboard / Windraft / Ivex-SPICE, PCB Studio, PCBWizard (with LiveWire PCB production package) , UltiBOARD7 (with multiSIM2001 supporting PCB production software package) and so on.