Media

Transportation media

1. land
   vehicles:  carriages, bicycles, trains, and cars.
2. water
   vehicles:  rafts, canoes, ships, and submarines.
3. sky
   vehicles: balloons, planes, and spacecraft.

Only the sky requires technology for us to navigate, though it has the advantage of reaching anywhere on the planet.

Communications media

1. The one-to-one, or interpersonal medium
2. The one-to-many, or mass medium
3. The many-to-many, or new medium