metro signalling system in other countries

What type of signaling systems are used by the paris,tokyo,moscow metros ,berlin u-bahn and the london underground and how they differ from each other?

rail10 wrote:What type of signaling systems are used by the paris,tokyo,moscow metros ,berlin u-bahn and the london underground and how they differ from each other?

Moscow has classical automated block with stop arms on two lines, rest of the system has cab signalling with speed control and no wayside signals (except for home signals).