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GPS augmentation system

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Definition: field engineer

A person who is responsible for hardware installation, maintenance and repair. Formal training is in electronics, although many people have learned on the job.

Tube Maintenance
Imagine checking all 18,000 vacuum tubes on this baby. In 1946, the ENIAC was the first operational electronic computer in the U.S. See ENIAC. (Image courtesy of Rare Book & Manuscript Library, University of Pennsylvania.)