In many recent data-intensive applications, data are in for of infinite, rapid and time-varing data streams. Most of the applications require to process input data streams fast. Applications in biology, meteorology, astronomy, military, security, web applications such as search engines, social networks, monitoring systems (sensor networks, healthcare, etc.), financial and transactional or analytical systems at enterprises are just some. in order to achieve this goal, parallel processing of data streams is issued in this book.