89. Other areas of research of general interest to physicists
89.20.+a Industrial and technological research and development
89.30.+f Energy resources
89.40.+k Transportation
89.50.+r Urban planning and development
89.60.+x Environmental and ecological studies
89.70.+c Information science
89.80.+h Computer science and technology
89.90.+n Other areas of general interest to physicists