This document discusses demultiplexers and is authored by group members Md. Shamsuzzaman, Shaikat Saha, Shibli Sadik, and Atif Rizwan. It defines a demultiplexer as a digital switch that takes a single input and routes it to multiple outputs based on select lines. The document describes 1-to-2, 1-to-4, and 1-to-8 line demultiplexers and includes their truth table. Diagrams of demultiplexer functions are also provided.