Ports

boatguy1982

Some info about ports (far from all the ports but some of the common ones):

Parallel-
http://computer.howstuffworks.com/parallel-port.htm
USB-
http://computer.howstuffworks.com/usb.htm
Serial-
http://computer.howstuffworks.com/serial-port.htm
SCSI-
http://computer.howstuffworks.com/scsi.htm