"file hierarchy tree" root

purpose

the categories as used in Block Diagram ("BD", http://neo900.org/stuff/block-diagrams/neo900/neo900.html ) are liked from here

Details

list of categories with their category index pages

• Audio
• Core
• ECI
• ISM
• Lights
• Other
• Power
• Sensors

• Telephony

  ( edit-HOWTO )