An evaluation copy refers to a version of a product or software that is given to potential users for testing and feedback purposes. Synonyms for evaluation copy include trial copy, demo version, alpha release, beta version, test sample, and prototype. These terms are commonly used in the software and electronic industries to describe a product that is still in development or is being offered as a free trial to gauge user interest and preferences. A prototype is typically the first version of a product that is used to test its functionality and identify potential flaws before it is mass-produced. In contrast, a demo version is usually a more polished version of the product that gives users a chance to test all its features.