Service Charge

Service charge is an amount paid by occupants of a facility to provide some services to them. The provided services such as security; power; water; maintenance and repairs; and janitorial will enhance the value of the facility/property.

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The Greatest Engineering Achievements of The 20th Century

Speaking on behalf of the National Academy of Engineering (NAE), astronaut/engineer Neil Armstrong announced the 20 engineering achievements that have had the greatest impact on quality of life in the 20th century. The announcement was made during National Engineers Week 2000 at a National Press Club luncheon.

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Refrigerant

A refrigerant is a fluid (a liquid or a gas) that has a very low boiling point. Refrigerants are used in cooling units such as air conditioning units, refrigeration and freezing. A refrigerant evaporates into vapour and condenses back into liquid when in operation.

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