Hi All, Can someone guide me about format of Gerber files, i.e, how it describes the PCB plot into a series of draft codes and coordinates, and how the aperture file is extracted from the primitives (tracks,pads,etc) in the current PCB file. Regards, Adeel Malik, Design Engineer, Enabling Technologies, Islamabad, Pakistan. ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu