Motherboard:The Motherboard is the main circuit board for the computer, containing both soldered, nonremovable components along with sockets or slots for components that can be removed. The motherboard holds the CPU, RAM and ROM chips, etc. Additional InformationThe Arithmetic Logic Unit (ALU) performs arithmetic operations (such as addition and subtraction) and logical operations (such as comparing two values). The Control Unit deciphers and carries out instructions. A hard disk is similar to a floppy disk but uses metal platters to store information. Hard disks are not only much faster than floppy disks but can hold huge amounts of data (hundreds of gigabytes). Hence, only motherboard holds together the various important components of a computer such as the CPU, memory, and input/output devices