Twenty Years On

Ten years ago, the articles in this magazine´s inaugural issue provided a snapshot of the start of the art in pervasive computing and charted the progress the field had made in the 10 years since Weiser´s seminal article. To mark the 20th anniversary, this issue similarly contains a series of articles that reflect on Weiser´s vision, consider how far the field has come, and ponder where we´re headed.Mark Weiser, pervasive computing, ubiquitous computing