18.1.2. “Open Source License” shall mean a license that requires as a condition of use, modification, or distribution of software subject to the license, that the software or other software combined or distributed with the software be (a) disclosed or distributed in source code form; (b) licensed for the purpose of making derivative works; or (c) redistributable at no charge.18.1.3. “Purchaser Background Property” shall mean all Intellectual Property owned by Purchaser prior to entering into this Agreement