Cosmetologists, barbers, and nail technologists provide beauty services to their clients.

Electricians install and repair electrical wiring and systems in residential and commercial buildings, following local and national electrical code specifications.

A heating, ventilation, air conditioning, and refrigeration mechanic installs and repairs systems that control air temperature and movement in residential and commercial buildings.

Opticians order and adjust eyeglasses and contact lenses to clients who have had their eyesight evaluated by an ophthalmologist or optometrist.

Plumbers install, maintain and repair the pipes and fixtures that carry water, gas or drainage to or from a building.

Surveyors measure land, air space, and water areas and describe what it looks like and how much is available. Their findings are used in deeds, leases, and other legal documents.