Digital Vs Analog Technology

In digital technology, there are only two states, logic 0 and logic 1. They are fixed points. In analog technology, any two points can be represented as two logic levels.

Data storage is mostly digital now-a-days because of cost,density,ease. CCTV or anything it may be, digital data is stored in ROM ( Read only Memory ) or EPROM (Erasable and Programmable ROM) or Flash memory. All of these include the same technology of storing digital information using transistors,capacitors.