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This paper describes an interactive graphics package for power system analysis education. The input of power networks and the output of the calculation results is organized in diagrammatic terms familiar to the engineering practice. The available facilities for direct modification, deletion or addition of any network elements and the fast response to these changes offer a great degree of flexibility in conducting studies for realistic power system problems. A semigraphic video display terminal coupled to a microcomputer with 64k core memory was used to produce the suitable interactive environment.