0 • A • B • C • D • E • F • G • H • I • J • K • L • M • N • O • P • Q • R • S • T • U • V • W • X • Y • Z
1: Active solar heating system 2: Soil 3: Community 4: Human 5: Feeder 6: Water 7: Lead 8: Environment 9: Range 10: Current 11: Condition 12: Process 13: Contamination 14: Atom 15: Electricity 16: Carbon 17: Plant 18: Fishery 19: Hazard 20: Conservation (As of 00:02)
