Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A professional is a member of a vocation founded upon specialised educational training. The word professional traditionally means a person who has obtained a degree in a professional field. The term professional is used more generally to denote a white collar working person, or a person who performs commercially in a field typically reserved for hobbyists or amateurs. In western nations, such as the United States, the term commonly describes highly educated, mostly salaried workers, who enjoy considerable work autonomy, a comfortable salary, and are commonly engaged in creative and intellectually challenging work. Less technically, it may also refer to a person having impressive competence in a particular activity. Because of the personal and confidential nature of many professional services and thus the necessity to place a great deal of trust in them, most professionals are held up to strict ethical and moral regulations.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.