Brandon Halleran The power supply for your personal computer gives your machine all the different voltages it needs to operate properly. It is able to take the AC (alternating current) voltage from your home electrical outlet and convert it to the lower DC (direct current) voltage that your computer needs. The main purpose of the motherboard is to allow other apparatus to communicate to each other via the motherboard. It also houses or stores all the components and eventually turns them into one element or unit. daughter boards are expansion boards that commonly connect directly to the motherboard and give the computer an added feature such as modem capability. Today, these boards are not found or used in desktop computers and have been replaced with ISA or PCI boards. However, some laptops still use these boards. a port serves as an interface between the computer and other computers or peripheral devices. Physically, a port is a specialized outlet on a piece of equipment to which a plug or cable connects. Electronically, the several conductors making up the outlet provide a signal transfer between devices. one of a set of small on-off switches mounted in computer hardware; used in place of jumpers to configure the machine for a user Allows a plug for the dip switch to plug in and complete its task. hard disk drive (HDD)is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. a disk storage medium composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic carrier lined with fabric that removes dust particles. The purpose of a video card is to generate a feed of output images to a display. Most video cards also accelerate the rendering of 3D scenes and 2D graphics and TV output. The disk controller is the circuit which enables the CPU to communicate with a hard disk, floppy disk or other kind of disk drive. a thin plate on which chips and other electronic components are placed. Computers consist of one or more boards, often called cards or adapters. incorporates the functions of a computer's central processing unit (CPU) on a single integrated circuit (IC),or at most a few integrated circuits. Microprocessor is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and provides results as output. A chip that holds programs and data either temporarily or permanently. A bus, in computing, is a set of physical connections (cables, printed circuits, etc.) which can be shared by multiple hardware components in order to communicate with one another.