This article focus to Define and Discuss on Output Devices. Here major focus on computer monitor. An output devices are definitely an electromechanical devices, which accepts data from the computer and translates them into a form which is suitable for use by the output device world for the users. In this output devices are instruments regarding interpretation and communication in between human and computers. These devices take equipment coded output results on the processor and convert these people into a form which can use by users.