there are many answers to this question:
There are 11 ports in a typical computer:
1) PS/2 port (keyboard)
2)PS/2 port (mouse)
3)USB ports
4)Ethernet Port (network)
5)Serial Port (dial-up modern)
6)LPT1 Printer Port (printer)
7)VGA Port (monitor)
8)Game Port (joystick)
9)Speakers
10)Line In
11)Microphone
Hope this helps,
kwrob :)