buttonpad board
arduinome shield
* *.cmp - Top Component Layer (Top Copper)
* *.sol - Bottom Solder Layer (Bottom Copper)
* *.plc - Top Silk Screen Layer
* *.pls - Bottom Silk Screen Layer
* *.stc - Solder Stop Mask Layer (Top Solder Mask)
* *.sts - Solder Stop Mask Layer (Bottom Solder Mask)
* *.drd - Excellon Drill Data