Pervasive computing refers to technology becoming embedded in everyday devices and having constant connectivity. It involves computers becoming smaller and more powerful, allowing chips and software to be embedded in many objects from clothing to homes. The goal is to create a constantly connected environment where devices seamlessly interact without obstructing the user. Examples include smartphones, which are mobile phones with operating systems and apps, and personal digital assistants (PDAs), which are handheld computers that can also function as mobile phones, web browsers and media players by connecting to wireless networks.