Monitors!!
Monitors are.......
Definition of a monitor.
Monitors are basically display on the screen and you can see what is going on from that.
Modern monitors are thin film transistor liquid crystal display whereas in olden monitors are cathode processing.
Monitors Shopping Guide - All about Pixel Density and Resolution NCIX Tech Tips
Newegg TV: PC Monitors
Monoprice 30Inch IPS CrystalPro Monitor