NAND is the most common type of flash memory. It is used in several types of storage devices, including SSDs, USB flash drives, and SD cards. NAND memory is non-volatile, meaning it retains stored data even when the power is turned off.

What does NAND stand for?

Surprisingly, NAND is not an acronym. Instead, the term is short for "NOT AND," a boolean operator and logic gate. The NAND operator produces a FALSE value only if both values of its two inputs are TRUE. It may be contrasted with the NOR operator, which only produces a TRUE value if both inputs are FALSE.

NAND vs NOR Flash Memory

NAND flash memory contains an integrated circuit that uses NAND gates to store data in memory cells. NOR flash memory stores data using NOR gates. While NOR devices read data faster, they are slower at writing data and do not store data as efficiently. NAND devices write and erase data faster and store significantly more data than NOR devices of the same physical size.

Overall, NAND storage is more efficient than NOR, which is why NAND is the most popular type of flash memory. As read and write speeds have improved, NAND devices have become faster than traditional hard drives. Therefore, SSDs and integrated flash memory have replaced HDDs in most computers.

Updated July 25, 2019 by Per C.

quizTest Your Knowledge

A diode has two ends, incluing an anode and what?

Correct! Incorrect!     View the Diode definition.
More Quizzes →

The Tech Terms Computer Dictionary

The definition of NAND on this page is an original definition written by the team. If you would like to reference this page or cite this definition, please use the green citation links above.

The goal of is to explain computer terminology in a way that is easy to understand. We strive for simplicity and accuracy with every definition we publish. If you have feedback about this definition or would like to suggest a new technical term, please contact us.

Sign up for the free TechTerms Newsletter

How often would you like to receive an email?

You can unsubscribe or change your frequency setting at any time using the links available in each email.

Questions? Please contact us.