Gerber Viewer (gerbv) is a viewer for Gerber files. Gerber files
are generated from PCB CAD system and sent to PCB manufacturers
as basis for the manufacturing process. The standard supported
by gerbv is RS-274X.
gerbv also supports drill files. The format supported are known
under names as NC-drill or Excellon. The format is a bit undefined
and different EDA-vendors implement it different.
gerbv is listed among Fedora Electronic Lab (FEL) packages.