Inside Ur PC (1) : Bus

Bus
Definition: A set of  parallel conductors, which allow devices attached to it to communicate with the CPU.
The bus consists of  three main parts:

Control lines Address lines Data lines

Control linesThese allow the CPU to control which operations the devices attached should perform, I.E. read or write.
Address lines
Allows the CPU to reference certain (Memory) locations within the device.
Data lines
The meaningful data which is to be sent or retrieved from a device is placed on to these lines.

 The Bus is set to run at a specified speed which is measured in MHz