Motherboard: The main printed circuit board (PCB) found in the general purpose microcomputers and other expandable systems.
Computer Fan: A computer fan is any fan inside, or attached to, a computer case used for active cooling, and may refer to fans that draw cooler air into the case from the outside, expel warm air from inside, or move air across a heat sink to cool a particular component.
Clock: In a computer, clock speed refers to the number of pulses per second generated by an oscillator that sets the tempo for the processor. Clock speed is usually measured in MHz (megahertz, or millions of pulses per second) or GHz (gigahertz, or billions of pulses per second).
RAM Chips: Similar to a microprocessor, a memory chip is an integrated circuit (IC) made of millions of transistors and capacitors. In the most common form of computer memory, dynamic random access memory (DRAM)
DVD Drive: Optical Disk Drive Defined. An optical disk drive (ODD) uses a laser light to read data from or write data to an optical disc. These include CDs, DVDs, and Blu-ray discs. This allows you to play music or watch movies using pre-recorded discs.
Computer Mouse: A computer mouse is a pointing device (hand control) that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, which allows a smooth control of the graphical user interface.
Computer Battery: First, is the backup battery, which is commonly referred to as the CMOS battery that holds your computer's settings, such as the time and date. Without a CMOS battery you would have to reset the time, date, and other system settings each time the computer starts.