The document contains the final four appendices to a staff paper submitted to the President's Task Force on Communications Policy. "The Digital Loop" describes changes in urban telecommunications which are predicted for 1970-80, considering three possible systems: paired wires with single analog signals (present telephones), coaxial cables with multiple analog signals, and coaxial cables with multiple digital signals. This latter system is the most versatile, efficient and promising for the next decade. The Panel on Urban Communications points out that although techniques exist which could solve most major urban problems, slow progress is made for the lack of incentive to change, especially in the public sector. Its report calls for a basic change of incentives and institutions in urban telecommunications. The third appendix concludes that cable TV will not replace the frequency spectrum in the future and that new channels will develop without governmental help. The last appendix summarizes future telecommunications via satellites utilizing low cost earth stations. (BB)