Looking at the financial situation of think tanks, different funding patterns can be found. While financial contributions from foundations play an important role especially for conservative think tanks, also contributions from governments are made to certain institutions. Yet one of the most important funding sources are corporate donors and individual contributors. Although the extent to which - in most cases conservative - think tanks rely on corporate funding varies, from the US$ 158 million spent by the top 20 conservative think tanks, more than half of it was contributed by corporations or businessmen.
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Communications satellites are relay stations for radio signals and provide reliable and distance-independent high-speed connections even at remote locations without high-bandwidth infrastructure.
On point-to-point transmission, the transmission method originally employed on, satellites face increasing competition from
In the future, satellites will become stronger, cheaper and their orbits will be lower; their services might become as common as satellite TV is today.
For more information about satellites, see How Satellites Work (
A superset of Boolean logic (