using radio, microwaves, etc. to transmit signals. broadcasting, computer networking, or other communication using radio signals.

according to what some say.

mentally or physically tiring. To become weaker or damaged from continued use.

Making full use of the qualities of something.

presence in or introduction into environment of substance which has harmful or poisonous effects.

engaging in speech. action of talking. To say things or ideas to someone with words.

young human. More than one child.

as stated by. To give (someone) the respect due to them.

group of houses and associated buildings, larger than hamlet and smaller than town. Small towns in the country.

person who does specified type of work. People who works.

person, animal, or machine that digs. Laborers who dig; machines for excavating.

container used as source of power. Portable devices that stores electricity.

To hold something inside something else.

study of past events.

have specified beginning.