The mother board is the main circuit board of your computer, it contains the connectors for attaching additional boards. Attached to the mother board you'll find, CPU, ROM, memory RAM expansion slots, PCI slots and USB ports. The mother board is what makes everything in your computer work together.
Input- An input is when you input something into the computer, i.e when you type into the keyboard it puts something into the computer
Output- An output is where something comes out of the computer, i.e when you type something into the computer and it comes out on the computer screen.
A touch screen computer is called a tablet. With a touch screen you don't have to use a keyboard you can use your finger to control the tablet. When the screen is touched the electrical current can tell the exact spot of contact and send the coordinates to the operating system