Acknowledging that DRAM, together with NAND Flash, is driving semiconductor technologies with a wide spectrum of usage--ranging from PC, mobile phone, and digital home appliances--this survey implicates the potential of floating body cell (FBC) properties in further increasing the bit density in electronic devices. Detailing FBC's operational principles and the scaling guideline, along with many simulation and hardware measurements results, which support the theoretical and simulated predictions on FBC properties, this summary provides authoritative insight on the future directions of FBC technologies.