RAM? Processor? Hard Drive? Motherboard?

When I talk with a client, there are times they give me a look as if I had lost them. Most of the time is when I am talking about RAM, Processor speed and size of the hard drive. Below is how I explain them, afterwards they seem to give me a look like a light bulb has just went on in their eyes.

• RAM is like our conscience memory.
• Processor is like us adding, subtracting, multiplying, and dividing.
• Hard Drive is like our sub-conscience memory.
• Motherboard or Mainboard is what brings all the computer parts together, and make them work together.