ch. 1. Introduction -- ch. 2. Concept of floating body cell and its operational principle -- ch. 3. Signal of floating body cell -- ch. 4. 128 Mbit floating body RAM on silicon-on-insulator -- ch. 5. Scaling of floating body cell -- ch. 6. Cell array architecture and sense amplifier design -- ch. 7. Design practices of floating body random access memory -- ch. 8. Floating body cell development activities and future directions.