A sign for house
squatters. This is
a modern ideogram used by members of a youth movement in Germanic
countries who occupy evacuated houses. The Group is involved in continuous fighting with the
police, the authorities, and the building constructors who are
demolishing habitable houses in cities' central areas in order to
earn money for their owners by awaiting the right time to build new
high-rises on the lots. The movement is closely associated with the
anarchist movement using the previous entry sign as their symbol.
In physics this sign is a symbol for static free system.