1. Military
1.1. Civilian
1.1.1. International Law
1.1.2. Philosophy
1.1.3. Diplomacy
1.1.4. History
1.1.5. Journalism
1.2. Domestic
1.3. Local
1.4. Governmental
1.5. War
1.5.1. Civil War
1.5.2. Revolutions
1.5.3. World Wars
2. Activism
2.1. Equal Rights
2.2. Martin Luther King Jr
2.3. Resistance
2.4. Rosa Parks
2.5. Racism
2.6. Jim Crow Laws
2.7. Malcolm X
2.8. Boycott
2.9. March on Washington
2.10. Segregation
3. Engineering
3.1. Architectural
3.1.1. Famous Buildings
3.1.1.1. Sydney Opera House
3.1.1.2. Burj Khalifa
3.1.1.3. One World Trade Center
3.1.1.4. The Shard
3.1.1.5. CN Tower
3.1.1.6. Louvre Pyramid
3.1.1.7. Torre Agbar
3.2. Environmental
3.2.1. Soil Treatment
3.2.2. Waste Mangement
3.2.3. Emmissions
3.2.4. Water Pollution
3.3. Structural
3.4. Transportation
3.4.1. Highway
3.4.2. Railroad
3.4.3. Port/Harbor
3.4.4. Airport
3.5. Urban
3.5.1. City Layout
3.5.2. City Planning
3.5.3. Traffic Flow
3.5.4. Pedestrian Flow
3.6. Material
3.6.1. Atomic
3.6.2. Nanostructural
3.6.3. Microstructual
3.6.4. Macrostructual
3.6.5. Synthetics
3.6.6. Polymers
3.6.7. Metal Alloys
3.7. Offshore
3.7.1. Oil Platforms
3.7.2. Artificial Islands
3.7.3. Submarine Pipelines
3.7.4. Submarine Cables
4. Kind
4.1. Gesture
4.1.1. Handshake
4.1.2. Hug
4.1.3. Smile
4.1.4. Salute
4.1.5. Bow
4.1.6. Nod
4.1.7. Shrug
4.2. Aid
4.2.1. Charity
4.2.2. Donate
4.2.3. Volunteer
4.2.4. Senior Care
4.2.5. Tutor
4.3. Manners
4.3.1. Courtesy
4.3.1.1. Please
4.3.1.2. Thanks You
4.3.1.3. Excuse Me
4.4. Greeting
4.4.1. Hello
4.4.2. Sir
4.4.3. Ma'am
5. Community
5.1. Neighborhood
5.1.1. Suburb
5.1.2. Families
5.1.3. Grass
5.1.4. Quiet
5.2. Society
5.2.1. Work
5.2.2. Crime
5.2.3. Achievement
5.3. Association
5.3.1. Family
5.3.2. Work
5.3.3. School
5.3.4. Common Interest
5.4. Socialization
5.5. Administration
5.5.1. Public Office
5.5.2. Mayor
5.5.3. Govenor
5.5.4. President
5.5.5. Ruler
6. Law
6.1. Non-criminal
6.2. Lawsuits
6.2.1. Settlements
6.2.2. Compensations
6.2.3. Injury
6.2.4. Resolutions