Computer knowledge

A main circuit board (Short: mainboard) is the main printed circuit board in general purpose computers, such as PC's and laptops. A mainboard provides connectivity between the hardware components of a computer. And usually contains significant sub-systems. It's the ''main'' of all components attached to it and it connects all the components of the computer together. It holds and allows communication between many of the crucial electronic components of a computer, such as the central processing unit (CPU) and memory, and provides connectors for other peripherals/ancillary devices, used to get information into and out of the computer. The mainboard also for example often includes connectivity for: Interface cards, sound cards, video cards, network cards, hard drives, cards providing extra USB and more. Other names for main circuit board: mainboard, system board, baseboard, planar board or logic board

Disk read/write heads are the small parts of a disk drive which move above the disk plattes and transform the platter's magnetic fields into electrical current for reading the disk or they transform electrical current into magnetic fields to write the disk.

The data on a hard disk is read by detecting the change in direction of the tiny fields being for example north-south or south-north. And this polarity is sensed by the RW (read, write) heads.

To write data on the hard disk, a magnetic field is placed on the tiny fields with a RW (read, write) head, in one of these two polarities: north-south, or south-north. An orientation in one direction, like north-south can represent the 0 while the opposite orientation south-north would then represent a 1.

A hard disk drive (Short: HDD) is an electro mechanical data storage device that uses magnetic storage to store and retrieve digital data/information using one or more rotating disks, also called platters, coated with magnetic material and magnetic heads, which read and write data to the platters surfaces using electromagnetism. The data is encoded into bits and written onto the surface of the hard disk as a series of changes in the direction of the magnetisation.

Computer binary codes are computer processor instructions. The binary code consists out of 0 and 1's. And the binary code assigns a pattern of binary digits, also known as bits.