In the last decade, the impressive growth of the portable systems market has attracted the interest of the semiconductor industry in non-volatile memory (NVM) technologies for both code and mass storage applications. The current NVM mainstream is based on Flash technology and it is expected that NOR and NAND Flash will be the high volume NVM production for several years. There is industrial interest in alternative technologies that exploit new materials and concepts to go beyond Flash technology, to allow better scaling and to enlarge memory performance. We review the current status of charge-storage based Flash memory technology and introduce the most promising alternative memory concepts. Expected trends and future perspectives are also discussed.