Tractors


 * amphibious tractor or amphibian tractor
 * bulldozer
 * calfdozer
 * Caterpillar 
 * continuous-track tractor
 * crawler tractor
 * creeper tractor
 * dozer
 * duck
 * farm tractor
 * grader
 * halftrack
 * lawn tractor
 * scraper
 * semi tractor
 * single-axle tractor
 * tank
 * tracklayer or tracklaying tractor
 * truck tractor
 * walking tractor
 * wheeled tractor
 * yard tractor