- Monitor: Displays visual output from the computer. It is an output device. - Touchscreen: This is a display device (output) that also has a touch- sensitive surface for user input (input). It is a combined input/output (I/O) device. - Printer: Produces a hard copy of digital information on paper or other media. It is an output device. - Plotter: Similar to a printer but used for vector graphics, drawing lines onto paper. It is an output device. Since a touchscreen functions as both an input and an output device, it is the one among the list that is not solely or primarily considered just an output device, distinguishing it from the others which are purely or primarily output devices.