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This note describes a simulator for the DEC PDP-8 computer. The simulator is intended as an aid tor students starting to learn assembly language programming. It utilises the simple graphIcs capabilities of the terminals in the department's laboratories to present. on the termInal screen. a view of the operations of the simulated computer. The complete system comprises two versions at me program two simulating a PDP-8 computer and a simplified "assembler" tor preparIng students' programs for execution. There are also a number of example PDP-8 programs illustrating partiCUlar aspects of that computer.