Computers and computing are all around us. Some computing is highly visible, like your laptop. But this is only part of a computing iceberg. A lot more lies hidden below the surface. We don't see and usually don't think about the computers inside appliances, cars, airplanes, cameras, smartphones, GPS navigators and games.

Brian Kernighan’s quote sheds light on the pervasive presence of computers in our daily lives. He begins by acknowledging the obvious forms of computing, like our laptops, which are highly visible and commonly used. However, Kernighan uses the metaphor of an iceberg to describe how much of computing goes unnoticed. While we see certain devices, there is a vast network of hidden computers operating silently in the background, making many everyday tasks possible.

The quote emphasizes how much of our interaction with technology is indirect. Kernighan points out that many of the devices we rely on daily, such as appliances, cars, airplanes, cameras, smartphones, GPS navigators, and games, contain computers that we rarely think about. These hidden computers perform essential functions, yet because they are not visible, we often take them for granted. This underscores how computing has become seamlessly integrated into our lives, often without us being fully aware of it.

Kernighan’s point is that computing is not just about the devices we use directly, but also about the invisible systems embedded in the products we depend on. This invisible computing plays a crucial role in modern society, enhancing the functionality and efficiency of countless technologies. By referring to the iceberg, Kernighan encourages us to recognize that much of the computing that powers our world is hidden beneath the surface, working silently and effectively.

The origin of this quote lies in Kernighan’s background as a computer scientist and one of the key figures in the development of the C programming language. As someone deeply involved in the evolution of computing, he is well-positioned to offer insights into how technology permeates every aspect of our world. His perspective highlights the ubiquity of computing, which extends far beyond the devices we are familiar with, to the countless systems we interact with on a daily basis.