Wikipedia have information on electric heating systems including the types of heating systems that are available. One can also find information on 'Which' including the costs and advantages of these heating systems.

what is the purpose and functon of the components and materials used including component identification systems

Belarus does have many technology including: automated control systems, electro-optical systems, weapon systems, information technology...

There are a few, including gravity based settling systems, passive filtration systems, and polymer treatment systems.

is the name of a unit of mass in a number of different systems, including various systems of mass
It is short for ounce.