Ubiquitous ComputingIntroduction: Ubiquitous computing is the trend toward computing devices that are increasingly ubiquitous (another name for the movement is ubiquitous computing) and connected in the environment, a trend brought about by a convergence of advanced electronics – and particularly wireless and Internet technologies. Ubiquitous computing devices are not personal computers as we tend to imagine them, but very small, even invisible devices that are mobile or embedded in almost every type of object imaginable, including cars, tools, appliances household appliances, clothing and various consumer goods. communicate through increasingly interconnected networks. In 1991, Mark Weiser introduced the idea of ​​pervasive computing: a world in which computers and associated technologies become invisible, and therefore indistinguishable from everyday life. This invisible computing is achieved through “embodied virtuality,” the process of drawing computers into the physical world. Weiser proposed that computing and communications facilities would follow the evolutionary path of the electric motor. Features: In 2001, Mahadev Satyanarayanan presented aspects of a pervasive computing environment in which instances of Weiser's pervasive computing world could now be explored, given the maturity of computing. communications technologies such as wireless LANs, portable and portable computers, and sophisticated, embeddable sensors. He also identified several key research areas in pervasive computing: smart spaces, invisibility, localized scalability, and uneven packaging. In short, a smart space is a well-defined space, open or closed, which integrates a set of embedded systems (computers, sensors, user interfaces and service infrastructure). Invisibility is the intention that users are not unnecessarily distracted by their interaction with ubiquitous computing technologies. Localized scalability is about efficiently managing the exchange of information between users and their environment. Considerations include bandwidth and power consumption, as well as controlling user distraction. Finally, uneven packaging refers to the current lack of consistent technologies and services in a user's environment; for example, wireless connectivity may be present in one building but not in another. A number of companies and higher education institutions have launched large research projects aimed at studying the requirements and implementation of pervasive computing environments. These research activities identified the following characteristics of a pervasive computing environment: minimal user distraction, collaborative interaction, user mobility, context awareness (user/time/location), resource and location discovery, ambient information, quiet technology, event notification, adaptive interfaces. ,Invisibility: increase in everyday objects, Anytime and anywhere. Considering the above characteristics, the possible positive effects that pervasive computing can have on productivity in our lives (at school, at work and at home) could be significant.: