What is the fine-grained topic of the following text: Abhishek Reddy DV, Athish Tejashwi Kumar, Goutham G, Dr. Jitendranath Mungara , "Technical Review on Smart Parking System Using IoT", International Journal of Scientific Research in Computer Science, Engineering and Information Technology (IJSRCSEIT), ISSN : 2456-3307, Volume 2, Issue 3, pp.462-464, May-June-2017. Only return the topic.
Smart Parking System Using IoT