
Document
Grades: 3 4 5
Telecommunications is the word we use for the science and technology of sending messages using electricity.This includes the telegraph, telephone, radio, television, and computers. These instruments change information into signals that are sent over long distances, through wires, or through optical fibers, or by radio waves, or satellite. The information can be almost anything--voices, music, pictures, words, or computer data and it arrives almost immediately.
Read the history of telecommunication and how television became the world’s most popular form of entertainment.
Document
Grades: 3 4 5
Document
Grades: 3 4 5
Document
Grades: 3 4 5
Document
Grades: 3 4 5
Document
Grades: 3 4 5
Document
Grades: 3 4 5