This textbook provides a quick and easy understanding of multistage interconnection networks (MINs) for engineers. The book contents focus on the design, performance metrics, and evaluation of these networks which are crucial in modern computer architecture. The contents equip engineering students, apprentices and professionals with in-depth knowledge and analysis of MINS, enabling them to build complex computer architectures for efficient data communications and cost effective solutions for circuit design. The book starts with an introduction to MINS and subsequently progresses to the evaluation of a range of MINS (SEN, Gamma-Minus, FTSN, FTGN, SEGIN). Tremendous advancements have been reported in the computer and communication industries due to the high demands of big data analysis. This led to the use of parallel and distributed processors to play a part. These parallel processors have to be connected to a large number of memory modules. The connection between these processors and memory modules must be highly reliable for efficient Big Data analysis. Multistage interconnection networks (MIN) provide data communication between processors and memory modules at efficient speed with reasonably high reliability.