In 1995, I published The Digital Economy, a book that became one of the first best-sellers about the internet in business. To mark its 20th anniversary, my publisher asked me to write a dozen mini-chapters for a new edition. As I revisited it, I was struck by how far we’ve come since 1995 and by how many concepts in the book have withstood the test of time. “The digital economy” term itself has become part of the vernacular.