Jobs

Scientist: Scientist is generally a person who is dedicated to producing results and conceptual advances in science, in scientific-technical, for this by using the scientific method

Firefighter is a person who is dedicated to fighting fires, traditionally using hydraulic pumps, which are used to draw water from wells, rivers or other warehouse near the scene. Is attributed to Emperor Augustus created the first fire department in Rome

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Traditionally the main task of the firefighter has been extinguishing fires in past decades but the number of technical aids has increased.
So, now the firefighters have vehicles that have equipment to extinguish the fire and also to help in other emergencies.

Doctor: It is a job which is concerned in maintaining or restoring human health through the thestudy, diagnosis,and treatment ofdiseaseor injury. This properly requires both a detailed knowledge of the academic disciplines (such as anatomy andphysiology) underlying diseases and their treatment.

Both the role of the physician and the meaning of the word itself vary significantly around the world, but as generally understood, the ethics of medicine require that physicians show consideration,compassion and benevolence for theirpatients.