The Building Blocks in Parts II and III describe programs whose objectives are supportive in nature and often cut across several energy technologies. The eight Building Blocks contained in Part II are divided into Two major program areas: Environmental Research and Safety, and Basic Energy Sciences. The six activities contained in Part III are not unique to energy RD&D but are necessary for achievement of its objectives. Part IV consists of three tables. They contain cross-referencing data that will allow the reader to examine the Building Blocks from the different perspectives of the National Energy Technology Goals, Volume 1 Technologies, and Federal Agency Involvement