Pictured below are some of the ports you will find on your home desktop
This Aux port is for connecting headphones or speakers. The DVI-D is for connecting monitors, usually older ones.
This USB port is used to connect anything from chargers to keyboards.
The power supply port connects the power wire to the power supply box to plug into the wall.
1. The purple port on the right is a PS/2 keyboard port while the green on the right is a PS/2 mouse port
2. This is an HDMI audio/video port
3. This is a VGA video port
2. This is an HDMI audio/video port
3. This is a VGA video port