The document discusses the history and concepts of digital revolution, e-commerce, and virtual communities. It began in the 1980s with the rise of electronics and digital technology, moving from analog to digital. Virtual communities emerged, consisting of online groups sharing common interests. E-commerce involves buying and selling over the internet, replacing physical stores, and new platforms are emerging for e-commerce. Various e-commerce models and classifications are presented. Web 2.0 enabled a more interactive experience between users and publishers online. In conclusion, e-commerce has impacted businesses, customers, and society through conveniences like access 24/7, global markets, new jobs, and online education.