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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Those encompass the industries that create copyrighted works as their primary product. These industries include the motion picture industry (television, theatrical, and home video), the recording industry (records, tapes and CDs), the music publishing industry, the book, journal and newspaper publishing industry, and the computer software industry (including data processing, business applications and interactive entertainment software on all platforms), legitimate theater, advertising, and the radio, television and cable broadcasting industries.