The chapter introduces the concept of "calm technology" in the context of technological change, emphasizing how technology's relationship with our lives has evolved over the past fifty years. It outlines two major trends: the mainframe era and the PC era. The mainframe era, characterized by shared and scarce resources, is contrasted with the PC era, where personal and intimate relationships with technology emerged. The transition to the Internet and distributed computing marks a new phase, leading towards ubiquitous computing, where computation is deeply embedded in the world. This shift necessitates a new approach to integrating technology into our lives, known as "calm technology," which focuses on designing technology to be less intrusive and more seamless.The chapter introduces the concept of "calm technology" in the context of technological change, emphasizing how technology's relationship with our lives has evolved over the past fifty years. It outlines two major trends: the mainframe era and the PC era. The mainframe era, characterized by shared and scarce resources, is contrasted with the PC era, where personal and intimate relationships with technology emerged. The transition to the Internet and distributed computing marks a new phase, leading towards ubiquitous computing, where computation is deeply embedded in the world. This shift necessitates a new approach to integrating technology into our lives, known as "calm technology," which focuses on designing technology to be less intrusive and more seamless.