The book will introduce the fundamentals of iterative learning control theories and applications. It will introduce the fundamentals of iterative learning control including the motivation, its historical development, the general design framework and many practical applications. The book will focus on a number of widely used ILC algorithms and the key considerations in practical implementation. The power of ILC will be demonstrated through three carefully selected case studies in manufacturing, health care and aviation where the process of the system modelling, algorithm design and practical implementation will be detailed.