a turned on computer monitor 
the blue screen of a monitor
a windows operating system
a computer on a table
the monitor on the computer
a white board on the wall
Black computer monitor on top of desk.
Blue Windows computer screen.
Black monitor behind black keyboard
Whiteboard next to monitor
black monitor is on
Log in screen on the computer monitor 
computer screen behind keyboard
writing board on the wall
the desk has a black keyboard, mouse, and monitor on it