• (1) Contribution: highlight the paper?s main contribution(s); what is the novelty of the paper? what is the main idea/concepts that the author is trying to convey? what does it add to the state of the art?
• (2) Reflection: based on your judgment, what are the strengths/positive and limitations/negative aspects of the contribution?

The author proposes a significant shift in how one relates to technology: "The most profound technologies are those that disappear". In this paper, the author coined the term Ubiquitous Computing, which refers to technology being embedded in everyday life; technology that does not require active attention but is available to use at a glance.

At the time, this proposal went against the current trends in computing, which were personal computers and virtual reality. Both technologies require users' full attention to operate them, both are far from being part of the environment, and one of them even requires the user to be immersed in an alternative reality. Marc proposed a new way of thinking about computers, one that puts the human world at the centre and allows the computers to vanish into the background. The author even predicts how technology would evolve, what kind of devices we would be using and for what means, and even addresses social issues such as data privacy. Nevertheless, Marc fails to provide concrete design principles on how to design for this new era of computing and most of the examples are just flat screen portable devices rather than everyday artefacts embedded with computational power. Still, it is hard to believe that all these ideas were introduced in 1991.