Decoders, 3 to 8 decoder using two 2 to 4 decoders, 4 to 16 decoder, Implementing function using Decoders, Decoder Applications, Encoders, Priority Encoder, Binary to Gray Using Encoder-Decoder, Encoder Applications. Multiplexers, 2-to-1 multiplexer, 4-to-1 multiplexer, Tri State Buffer, 2:1 MUX using Tri-state buffer, 4:1 MUX using Tri-state buffers and 2 to 4 Decoder, Boolean Function implementation with Mux, Demultiplexers, Magnitude Comparators.