environmentally responsible and eco-friendly use of computers and their resources. In broader terms, it is also defined as the study of designing, engineering, manufacturing, using and disposing of computing devices in a way that reduces their environmental impact, (green computing) environmentally responsible use of computers and related resources. Such practices include the implementation of energy-efficient central processing units (CPUs), servers and peripherals as well as reduced resource consumption and proper disposal of electronic waste (e-waste)., information technology that is designed for gentle use of the environment and resources throughout its lifecycle, focusing on three topics: - use of energy in the manufacture and use of hardware - deployment of the materials and production resources used, in particular the use and emission of pollutants - energy-efficient operation of technology