This paper gives a detail analysis of various applications based on Internet of Thing (IoT) s. This explains about how internet of things evolved from mobile computing and ubiquitous computing. It emphasises the fact that objects are connected over the internet rather than people. The properties of Internet Of Things (IOT) are product information, electronic tag, standard expressed and uploading information. It utilises the Radio Frequency IDentification (RFID) technology and Wireless Sensor Networks (WSN). IOT applications are used in domains such as healthcare, supply chain management, defence and agriculture. Lastly the paper focuses on issues involved in IOT. Though it is a boon, IOT faces certain crucial issues like privacy and security.