The mb full form is MegaByte. For digital data, the megabyte is a multiple of the unit byte. MB is the recommended unit symbol. In the International System of Units, the unit prefix mega represents a multiplier of 1000000 (106). As a result, one megabyte equals one million bytes of data. The International System of Quantities now recognizes this definition.
1 MB = 1000000 bytes (= 106 B = 10002 B)
The primary printed circuit board (PCB) in general-purpose computers and other extensible systems is known as the motherboard (also known as the mainboard, main circuit board). It houses and facilitates communication between many of a system’s critical electronic components, including as the central processing unit (CPU) and memory, as well as peripheral ports. A motherboard, unlike a backplane, usually comprises substantial sub-systems such as the core CPU, the chipset’s input/output and memory controllers, interface connections, and other general-purpose components.
The term “motherboard” refers to a PCB having expansion capability. This board is sometimes referred to as the “mother” of all peripherals, interface cards, and daughtercards attached to it, which can include sound cards, video cards, network cards, TV tuner cards, IEEE 1394 cards host bus adapters, and a number of other bespoke components.