A photo essay about the history, development, and impact of automobiles from horseless carriages and Model T Fords to today's high-performance racing cars; featuring detailed cutaway photos showing how the moving parts of a car work.

Photographs and text describe such work-saving machines as a crane, jack hammer, bulldozer, and back hoe.

Pictures and simple text describe different kinds of motor vehicles and the work they are used for.

Photographs and simple text present some of the different machines used on farms, including tractors, cultivators, balers, and combine harvesters.

Explains what a digger is, discussing its parts and types of jobs the machine can do, including digging holes, dredging rivers, and breaking apart buildings.

Gives information about this machine by listing its working parts, describing its cab, and explaining how it is used throughout the world and how it is constructed.

Illustrations and simple text describe machines that are used in road and house building, forestry, and mining industries.