AS a lot of CAD packages use .PCB as the extension for their CAD files,
I'd suggest ringing your customer up
and asking them. That would be the quickest & simplest answer.

To name a few programs, Cadstar, EasyPC, Boardmaker these use .PCB as an
extension.
I think that even CAM350 uses it too.
If this is the case, there is a viewer (not so sure about being free)
available from www.ecam.com for this.

>-----Original Message-----
>From:  Phil O'Reilly [SMTP:[log in to unmask]]
>Sent:  Tuesday, February 08, 2000 2:27 PM
>To:    [log in to unmask]
>Subject:       [TN] Opening *.pcb CAD files
>
>Hi everyone,
>
>        I received a CAD file with a *.pcb extension from a customer. The
>gerber viewer I have (GerbTool) does not allow me to view this type of file.
>It is an ASCII format. Would anybody know a software (freeware preferably)
>that would allow me to view this type of file.
>
>Thanks !
>
>Philippe O'Reilly
>
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