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Logisim is an educational tool designed to help you with the design and simulation of digital logic circuits, featuring a simple-to-learn interface, hierarchical circuits, wire bundles, and a large component library.

FEATURES:

· The drawing interface is based on an intuitive toolbar. Color-coded wires aid in simulating and debugging a circuit.
· The wiring tool draws horizontal and vertical wires, automatically connecting to components and to other wires. It's very easy to draw circuits!
· Completed circuits can be saved into a file, exported to a GIF file, or printed on a printer.
· Circuit layouts can be used as "subcircuits" of other circuits, allowing for hierarchical circuit design.
· Included circuit components include inputs and outputs, gates, multiplexers, arithmetic circuits, flip-flops, and RAM memory.
· The included "combinational analysis" module allows for conversion between circuits, truth tables, and Boolean expressions.