Advances in computers and communications have revolutionised the way we live. This has happened in a short span of sixty-five years. Today we wonder how people lived without access to mobile phones and the Internet. This book seeks to answer the following questions lucidly to a non-specialist general reader: How did this revolution happen? What groundbreaking inventions led to this revolution? Why are they groundbreaking inventions? Who were the innovators and inventors of these technologies? What led them to these inventions? Fifteen groundbreaking inventions: Fortran, Integrated Circuits, Relational Database Management Systems, Local Area Networks, Personal Computers, Public Key Encryption, Computer Graphics, Internet, GPS, World Wide Web, Search Engines, Digitisation and Compression of Multimedia, Mobile Computing, Cloud Computing, and Deep Learning (AI) are described cogently by Professor V. Rajaraman, a doyen of Computer Science education and research in India.