What is the difference between eeprom and flash?

A flash drive is a storage device that uses flash memory rather than conventional spinning platters to store data.

Random access memory (RAM) is a type of computer data storage. Today it takes the form of integrated circuits that allow the stored data to be accessed in any order, i.e. at random. The Word random thus refers to the fact that any piece of data can be returned in a constant time, regardless of its physical location and whether or not it is related to the previous piece of data.