NAND is a type of digital logic gate that produces an output which is false only when all its inputs are true. It is a fundamental building block in digital electronics and is widely used in various applications, including computer circuits and memory devices. The name "NAND" is derived from the combination of "NOT" and "AND," indicating that it performs the opposite function of an AND gate. In computer memory, NAND flash memory is a non-volatile storage technology that retains data even when power is turned off. It is commonly used in devices like USB drives, solid-state drives (SSDs), and memory cards. NAND flash is known for its speed and efficiency, making it a popular choice for storing large amounts of data.