Technical Library

During Cohen’s years with the Delaware State Planning Office (1967-1971), he created a library classification system for planning related materials including reports, pamphlets, studies, books, periodicals, and other materials useful for research. Modeled on a cataloging system used at the Fels Institute at the University of Pennsylvania, Cohen’s creation was easily adaptable for use in any planning office. Each document was given a three digit call number designating its major category, sub-category, and regional classification. Within the categories, items were then giving a sequential number. In addition to a call number, materials were also given a volume or report number as well as a year. Major Categories

A. General Reference C. Coastal Zone Management, Waterfront, and OCS (Outer Coastal Shelf) E. Business, Commerce, and Economics F. Finance G. Neighborhood and Community Planning and Redevelopment H. Historic Preservation I. Community Facilities and Services J. Recreation, Parks, and Open Space M. Population N. Housing Supply P. Government and Public Administration R. Natural Resources and Physical Environment S. Land Use T. Transportation U. Planning and Theory Sub-Categories

A. General Reference A0. General A1. General Periodicals A2. General Newsletters A3. Research Aids-Bibliography A4. Analytical Aids-Quantitative A5. Annual Reports and Organization Portfolios and Directories

C. Coastal Zone Management, Waterfront, and OCS (Outer Coastal Shelf) C0. General C1. Bibliography C2. Management, Regulation, and Planning Techniques C3. Natural Environment C4. Social and Economic Analysis C5. OCS Development C6. Waterfront Planning-Plans, Design, and Development C7. Funding Sources-Finance

E. Business, Commerce, and Economics E0. General E1. Economic Resources E2. Economic Analysis and Impact E3. Industrial Development E4. Retail and Commercial Development E5. Labor Force and Employment

F. Finance F0. General F1. Operating Budgets F2. Capital Budgets and CIPS F3. Financial Analysis and Fiscal Impact F4. Taxation and Revenue F5. Project/Facility Finance F6. Federal Grants in Aid and Federal and State Assistance Programs

G. Community and Neighborhood Planning and Redevelopment G0. General G1. Community Development Program G2. Development and Redevelopment G3. Social and Community Impact G4. New Towns/Communities G5. Urban Sociology and Geography H. Historic Preservation H0. General H1. Surveys and Inventories H2. History H3. Preservation Programs and Techniques H4. Adaptive Reuse

I. Community Facilities and Services I0. General I1. Water Systems and Resources I2. Sewer Systems and Disposal I3. Street Maintenance and Refuse Collection I4. Solid Waste Management and Disposal I5. Electricity I6. Public Buildings and Siting I7. Public Safety (Police) I8. Fire Protection I9. Public Health and Health Facilities I10. Education (including University of Delaware)

J. Recreation, Parks, and Open Space J0. General J1. Recreation J2. Aesthetics J3. Landscape Architecture and Beautification J4. Open Space/Land Acquisition J5. Bicycling

M. Population M0. General M1. Population Characteristics M2. Population Density, Projection, and Methodology

N. Housing N0. General N1. Inventory, Characteristics, and Projections N2. Construction N3. Housing and Building Codes N4. Special Housing

P. Government and Public Administration P0. General P1. Delaware Legislation and Rulings P2. Internal Organization and Management P3. Intergovernmental Relations P4. Legislative P5. Executive P6. Legal and Judiciary P7. Community Organization and Action P8. Politics P9. Personnel and Labor Relations P10. Public Policy Analysis

R. Natural Resources and Environment R0. General R1. Soils, Geology, and Erosion R2. Water Quality R3. Industrial Wastes and Disposal R4. Environmental Studies and Ecology R5. Natural Resources (Mineral, Forestry, Fisheries, Wildlife) R6. Energy

S. Land Use S0. General S1. Land Use Studies S2. Zoning Regulations and Studies S3. Subdivision Regulations and Studies S4. Annexation S5. Flood Plain S6. CBD S7. Urban Design S8. Site Planning and Architecture S9. Plans

T. Transportation T0. General T1. Highway Studies and Statistics (Plans) T2. Traffic Engineering and Safety T3. Parking T4. Mass Transit

U. Planning and Theory U0. General U1. Planning Theory U2. Planning Bibliography Regional Classification

1. General 2. Municipal 3. County 4. Metropolitan and Regional 5. State 6. Federal