Mechanics are people who are adept at using the tools for repairing and organizing a rod or machine. Most mechanics specialize in specific areas such as rail mechanics, bikes mechanics, motosical mechanics, mechanical enclosures, general mechanics, air-conditioning and freezing, aircraft mechanics, diesel engine mechanics.

The train mechanic, for example, has many inner majors. Half possible specialize in mechanical aspects.

Other parts include: brake and stering, automatic or manual transmission, engine repair or customer complaints diagnosis. The train technician has a wide range of fields to study.