These categories are in Wikipedia:WikiProject Electronics
Category:Electronics
|— Category:Avionics
|   |— Category:Aircraft radars
|   |— Category:Avionics computers
|— Category:Chip carriers
|— Category:Compound semiconductors
|— Category:Digital technology
|   |— Category:Classes of computers
|   |   |— Category:Avionics computers (already included, see above)
|   |   |— Category:Early computers
|   |   |   |— Category:Early microcomputers
|   |   |   |— Category:IAS architecture computers
|   |   |   |— Category:Portable computers
|   |   |— Category:Embedded systems
|   |   |   |— Category:Avionics (already included, see above)
|   |   |   |— Category:Avionics computers (already included, see above)
|   |   |   |— Category:Embedded microprocessors
|   |   |   |— Category:Firmware
|   |   |   |   |— Category:BIOS
|   |   |   |— Category:Graphing calculators
|   |   |   |— Category:Information appliances
|   |   |   |   |— Category:Mobile
|   |   |   |   |   |— Category:Mobile computer
|   |   |   |   |   |   |— Category:Mobile (already included, see above)
|   |   |   |   |   |   |— Category:Mobile computer stubs
|   |   |   |   |   |   |— Category:PDAs
|   |   |   |   |   |   |   |— Category:Psion devices
|   |   |   |   |   |   |   |— Category:Windows CE devices
|   |   |   |   |   |   |— Category:Pocket computers
|   |   |   |   |   |   |   |— Category:Programmable calculators
|   |   |   |   |   |   |   |   |— Category:Graphing calculators (already included, see above)
|   |   |   |   |   |   |— Category:Portable computers (already included, see above)
|   |   |   |   |   |   |— Category:Smartphones
|   |   |   |   |   |— Category:Smartphones (already included, see above)
|   |   |   |   |— Category:Mobile computer (already included, see above)
|   |   |   |   |— Category:Smartphones (already included, see above)
|   |   |   |— Category:Microcontrollers
|   |   |   |   |— Category:Microcomputer stubs
|   |   |   |— Category:Programmable calculators (already included, see above)
|   |   |   |— Category:Real-time computing
|   |   |   |— Category:Robotics
|   |   |   |   |— Category:Domotics
|   |   |— Category:Mobile computer (already included, see above)
|   |— Category:Digital audio
|   |   |— Category:Audio trackers
|   |   |   |— Category:Tracker musicians
|   |   |— Category:Digital dictation
|   |   |— Category:Digital radio
|   |   |   |— Category:DAB ensemble
|   |   |   |— Category:Digital only radio stations
|   |   |   |   |— Category:Sirius Satellite Radio channels
|   |   |   |   |— Category:XM Satellite Radio channels
|   |   |   |— Category:HD Radio stations
|   |   |— Category:MP3 sounds
|   |   |— Category:Peercasting
|   |— Category:Digital radio (already included, see above)
|— Category:Electronics (already included, see above)
|— Category:Electronics lists
|— Category:Embedded systems (already included, see above)
|— Category:WikiProject Electronics
|   |— Category:WikiProject Electronics articles
|   |   |— Category:Category-Class electronic articles
|   |   |— Category:Disambig-Class electronic articles
|   |   |— Category:Electronic articles by importance
|   |   |   |— Category:High-importance electronic articles
|   |   |   |— Category:Low-importance electronic articles
|   |   |   |— Category:Mid-importance electronic articles
|   |   |   |— Category:Top-importance electronic articles
|   |   |   |— Category:Unknown-importance electronic articles
|   |   |— Category:Electronic articles by quality
|   |   |   |— Category:A-Class electronic articles
|   |   |   |— Category:B-Class electronic articles
|   |   |   |— Category:FA-Class electronic articles
|   |   |   |— Category:GA-Class electronic articles
|   |   |   |— Category:Start-Class electronic articles
|   |   |   |— Category:Stub-Class electronic articles
|   |   |   |— Category:Unassessed electronic articles
|   |   |— Category:Image-Class electronic articles
|   |   |— Category:List-Class electronic articles
|   |   |— Category:Non-article electronic pages
|   |   |— Category:Portal-Class electronic articles
|   |   |— Category:Template-Class electronic articles