The Web contains all kinds of information today. Web archives preserve this data and make it long-term available. However, access is usually only provided by a URL and a timestamp. Hence, there is no deeper meaning attached to archived resources, although collectively they can represent entities, such as software. Moreover, documentation and source code that is available at different points in time, can even represent different versions of a software. Treating them as first-class citizens in web archives enables reliable and permanent references to software, which is normally hard to manage.