Engineering is the application of scientific, economic, social, and practical knowledge in order to design, build, and maintain structures, machines, devices, systems, materials and processes.

On the ranch he maintained the various appliances and machines, the electric generation plant, the milk house supplies and so on.

He had found a job maintaining machines that make fabric.

There the Board maintains sophisticated machines that clean up, enhance, and analyze the usually awful recordings we get off CVR's.

I made promotional films for the telephone company, I made a film on how to maintain machines that keep bottle caps on.

Skilled specialists set up and maintain machines, but the goal is always the same: to keep machines running.

These technological people include engineers, (a person who makes, builds, and maintains engines, machines, public works, and other technologies).

During World War II, he bought a new grindworks from Switzerland, which was seen as having the best maintained machines and systems still remaining.

Because it doesn't really cost anything to maintain it-the machines do all that, without a single human being involved.

There were the work worlds where he learned practicall mathematics and the art of maintaining machines and proper ways of addressing his kzin masters.