Open source adoption is growing rapidly, but adopters in U.S. are lagging behind European enthusiasm, according to software provider OpenLogic. OpenLogic announced Tuesday it has discovered more than 300,000 open source package and project installations in use around the world through its Open Source Census. OpenLogic initiated the global survey last December. The Open Source Census is a worldwide collaborative project. The goal is to collect and share quantitative data on the use of open source software.