What is the advantage of the NAND memory ?

[hary]

The Olimex A20-OLINUXINO-MICRO-4GB 1GB 4GB is said to have a 4GB NAND memory.

What is it exactly and what advantage does it have compared to other .... memory ? Are other memory different ?

[Lurch]

At the time the board was released, it was the only way to boot Android, so Android booted from NAND and Linux booted from SDCard. The boot sequence is SDCard - NAND ... so the advantage was that, if you didn't have an SDCard in place, it would boot Android, and if you did, it would boot Linux.  Since then there is an Android that boots from SDCard (although SDCard is slower), so the main advantage is no longer there.
You probably won't need it ... but Olimex likely won't change the board.  That's life.

[hary]

Ok I see, It has to be compared to the SDCard where is stored the OS like on a hard drive on a PC computer.

It has nothing to be compared with the 1GB DDR3 RAM advertised in the description.

Thanks for the reply.