Pervasive Computing:

• Pervasive computing, also called ubiquitous computing, is the growing trend of embedding computational capability (generally in the form of microprocessors) into everyday objects to make them effectively communicate and perform useful tasks in a way that minimizes the end user’s need to interact with computers as computers. Pervasive computing devices are network-connected and constantly available.
• It is a concept in software engineering and computer science where computing is made to appear anytime and everywhere. In contrast to desktop computing, ubiquitous computing can occur using any device, in any location, and in any format. A user interacts with the computer, which can exist in many different forms, including laptop computers, tablets and terminals in everyday objects such as a refrigerator or a pair of glasses.
• The underlying technologies to support ubiquitous computing include Internet, advanced middleware, operating system, mobile code, sensors, microprocessors, new I/O and user interfaces, computer networks, mobile protocols, location and positioning, and new materials.
• Pervasive computing is a combination of three technologies, namely:
  • Microelectronic technology: This technology gives small powerful device and display with low energy consumption.
  • Digital communication technology: This technology provides higher bandwidth, higher data transfer rate at lower costs and with worldwide roaming.
  • The Internet standardization: This standardization is done through various standardization bodies and industry to give the framework for combining all components into an interoperable system with security, service and billing systems.