The course, Introductory Concepts of Digital Computing, presents the fundamental concepts and techniques used in the designing process of digital computing devices. The series of modules included in this course will enable the learners to acquire basic knowledge about digital logic and digital electronic circuits. We begin this course with an introduction to digital systems and digital computing. The different number systems and conversions between numbers of different bases are also discussed with suitable examples. The topics that are mandatory for circuit designing such as binary arithmetic , logic gates and boolean algebra are detailed in different sessions .The main focus is to expose learners to the designing of combinational and sequential logic circuits. This course lays a strong foundation to make a big move in the core subjects like Digital Electronics, Computer Organization, Computer Architecture etc and it forms the basis of many of the next level courses. It will be beneficial for under grade students of Computer Science/Electronics as a core course, students who have opted computer science/electronics as complementary/elective courses, teachers of computer science/electronics streams and a layman who loves to design digital computing devices.