What is ram, what is Non Volatile SRAM, SRAM memory, non volatile RAM

 CY15B104Q Series 4 Mb (512K x 8) 3.6 V 40 MHz SMT Serial (SPI) F-RAM - SOIC-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--quantum-trap-nvsram/cy15b104q-sxi-infineon-3058992