Analysis of information sources in references of the Wikipedia article "Open architecture" in English language version.
"In some ways, the most far-reaching decision made by the team that built the IBM PC was to use an open architecture, rather than one that was proprietary to IBM. That decision led to the market for add-in boards, for large numbers of third party applications, and eventually to a large number of competitors all creating "IBM-compatible" machines. Bill Lowe went to IBM's Corporate Management Committee in July 1980 to propose the project"
