ATVS

1. manoeuverability

1.1. handlebars

1.2. control and steering

2. materials

2.1. rubber

2.2. metal

2.3. plastic

3. environmental sustainability

3.1. materials

3.2. processes

3.3. vehicles

4. surfaces/environments

4.1. grass

4.2. sand

4.3. snow

4.4. gravel

5. electronics

6. operation of ATV

6.1. handlebars

6.2. golf cart with steering

7. where are they used

7.1. military

7.2. emergency/rescue

7.3. mineral exploration

7.4. small scale forestry

7.5. agricultural

7.6. border patrol

7.7. construction

8. mechanisms

8.1. worm and worm wheel

8.2. rack and pinion

8.3. bevel gear

8.4. ratchet and pawl

8.5. crank and slider

8.6. supsension