P-CAD is a printed circuit board (a.k.a. PCB or PWB) computer-aided design software package. P-CAD was originally developed by Accel Technologies, an EDA software corporation from San Diego, California, which was acquired by Altium (then Protel International PTY LTD) in 2000.[1] The P-CAD product included schematic capture, component library management, PCB layout and routing, parametric constraint solver and auto-routing capability.
The last version of P-CAD was P-CAD 2006 with Service Pack 2, released in 2006. This was the last release made by Altium, who retired the product in favor of Altium Designer. This was the final outcome that was originally expected at the time of the merger of Protel with Accel - that the best features of both product lines would eventually be combined.[2]