Because citizens of an ABC city work 4 days a week, they have more leisure time than those in other cities. In addition, every ABC city constructed across the world is a tourism city. There will be various sports and leisure facilities there.
ABC Sports & Leisure is a subsidiary of ABC city. It designs and builds the sports complex of ABC city.
Every citizen is given a linux machine such as smartphones and smart rings.
Each linux machine is recording the daily activities of its owner.
All facilities and related devices are linux machines too. So, the city knows who have used what facilities how much and how long.
ABC Sports focuses on participating in sports rather than watching them, and keenly related to the ABC Health system. By observing each citizen's athletic activity, the city can monitor the health and medical status of each citizen. If a particular citizen's physical activity is significantly reduced, it ㅡ묘 suggest that something is wrong with her health and that some medical examination is needed. Therefore, the city can take appropriate action.
The quality of water and usages by citizens etc. are monitored online.