As rail systems become more automated, point control units are increasingly becoming electronic-based and the latest from Hanning and Kahl uses a microprocessor at its core. It features 256 KB of EPROM program memory and 4 KB of RAM with a seven-segment status display and a diagnostic RS232 interface. In Hong Kong, the majority of people live in high-rise buildings, many of them right next to one of the rail lines crossing the city, radiating noise that intrudes into adjacent apartments. Earlier this year, the hub of Europe's railway network moved well to the east as 10 countries, formerly part of the Soviet Union, accessed to the European Union.