Electrical engineering is a branch of technology dealing with the practical applications of electricity and electronics, and thus concerned with generation of electric power, design, and construction of electrical and electronic components, and the use of these components in integrated, functional systems. Power engineers are important in modern industry as electric motors are an integral part of most factory work, and electric lighting and air conditioning play a vital role in maintaining good working conditions. Communications engineers deal with construction of televisions, telephones, and other electronic equipment: perhaps their greatest success is the computer.