computer-controlled system - Computer controlled

 system is maneuvered with the use of a remote control. 

        screw-drive system – The door garage with a

screw-drive system works by sliding along the length

of a steel mechanism that lifts the door garage. 

        chain drive system - The chain-drive system

works with the use of a chain that mechanically moves

the garage door panels along a track.   The chain-drive

system is the most inexpensive type of system and is

the most commonly used among the three.