Integrated motherboards can have built in parts which can found found by adding expansion cards. All the software and programs needed on the motherboards are built in onto it, as it is an intergrated mothboard. You can find on some motherboards built in parts such as: serial and parallel ports (the external plug-in outside the case), the IDE(integrated development enviroment - a type of software that assists computer programmers) and joystick are all connected to the mothboard. Using integrated mothboards creates more space inside of the case and it is easier to acess letting air flow through it.

also added this picture, the case on an integrated mothboard:

meh! who needs a tagbox!
when you can talk face to face. lol
=]