Number systems and conversion, boolean algebra, the assetion level concept; minterm and maxterm expensions, Karnaugh maps,and Quine McCluskey minimization, combinatorial logic circuit design, NAND and NOR gate based design. State machines and sequential circuits flip-flops, minimization of state tables, state assignment. Higher level digital system desin using SSI-MSI blocks such multiplexers/decoders, adders, memory and programmable . gate arrays;bus oriented systems. Asynchronous sequential circuits, flow tables, timing hazards.