RAM and ROM are also called Immediate Access Storage.

Flash Memory is a specific type of EEPROM that can be erased and reprogrammed into big sections instead of one byte at a time.

Which type of computers do Indian Railways use to interact with the customers for the various online functions, like booking, cancellation, showing the current status and so on?

I am a perfect combination of Analog and Digital computer. I accept analog signals, convert them to digital and process them in digital form. Who am I?