Ultra small pc's due to Memristor:- Memristor is a type of circuit component that can be developed by the team of HEWlETT-PACKARD. As its name shows it can memories how much current has passed through it, And by alternating the amount of current that passes through it. It can save its electronic stateeven when the current is turned off.These devices are being developed for application in computer logic,memories,nanoelectronic and neuromorphic computer architectures.After some time memoristor is a big replacement for Flash,SSD,DRAMand SRAM.