Primary purpose of this lecture is to present Logic Operations and Digital Logic Gates. Degital logic gates are generally implemented using diodes or perhaps transistors acting seeing that electronic switches, but can also be constructed using vacuum cleaner tubes, electromagnetic relays, fluidic reason, pneumatic logic, optics, molecules, or even physical elements. With amplification, degital logic gates can be cascaded in the same manner that Boolean functions can be composed, allowing the construction of any physical model off of Boolean reason, and therefore. Reason circuits include like devices as multiplexers, registers, arithmetic logic products and computer recollection, all the way up through complete microprocessors, which may contain over 100 million gates.