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An air conditioner (AC) is a system or a machine that treats air in a defined, usually enclosed area via a refrigeration cycle in which warm air is removed and replaced with cooler air. In construction, a complete system of heating, ventilation, and air conditioning is called HVAC. Whenever Refrigeration is added it is called HVACR.
Android (operating system) Android is an operating system used in mobile devices. It is mostly used for smartphones, like Google 's own Google Pixel, as well as by other phone manufacturers like HTC and Samsung. It has also been used for tablets such as the Motorola, Xoom and Amazon Kindle. A modified Linux kernel is used as Android's kernel.
