Mathematical  517

• Algebraic 211
• Geometric 256
• Trigonometric 27
• Probability 23

Physical  369

• Electricity 5
• Electronic 100
• Classic physics 231
• Molecular atom 11
• Reaction 22

Life  157

• Health 50
• Daily 102
• Financial 4
• Insurance 1

Conversion  72

• Time date 2
• Length angle 14
• Speed rate 4
• Mass weight 10
• Power, energy 20
• Other conversions 22

Discipline  2

• Geographic 1
• Mapping 1
• Environmental
• EIA
• 大气计算
• 农业计算

IT  101

• Computer 58
• Web 43

Industrial  110

• 水力计算
• Geogrpahy 11
• Envorinment 12
• Material 62
• Mechanical 15
• Building 10