Energy Storage and the Energy Systems.- Sensible Heat Storage.- Low Temperature Latent Heat Thermal Energy Storage.- Chemical Heat Pipes (Reversible Chemical Reactions at Medium/High Temperature).- Hydrogen Production and Storage.- Storage in the Ground.- Short and Long-Term Thermal Storage in Solar Ponds.- Thermal Energy Storage in Community Systems.- Thermal Energy Storage for the Recovery of Industrial Waste Heat.- Thermal Energy Storage for Peaking Power Generation.- Transmission of Heat Using Hot Water Pipes Part I.- Transmission of Heat Using Hot Water Pipes Part II.- Metal Hydrides for Heat Storage of Combustion and Reaction Processes.- Heat Pumps Combined with Thermal Storage.- Solar Heat Storage: Comparisons and Goals.- Overview of the Thermal Storage Work within the Energy R and D Programme of the European Community.- United States Department of Energy Thermal Energy Storage Program.