PBS LearningMedia, which provides educational resources for teachers, staying relevance is of utmost importance. The information must be factually accurate and include context, while staying current to the website's main goals. As in the case of preservation, bit rot, link rot, and incompatibility negatively affect how users might access born-digital records, while mere functionality, e.g. video quality and legibility of any text, is also a concern. Additionally, considerations on how digital content can be inclusive of people with disabilities should be made, particularly in conjunction with assistive technologies such as screen readers, screen magnifiers, and speech-to-text software. Access is also affected by licensing laws — the lack of ownership of their digital collections leaves libraries with nothing when their license expires, despite the costs already paid. Licensing Laws created to protect the intellectual property were written for analog works; as such, provisions such as the first-sale doctrine of US copyright law, which enables libraries to lend materials to patrons, have not been applied to the digital realm. Therefore, certain copyrighted digital content that is licensed rather than owned, as is common with many digital materials, is often of limited use since it cannot be transmitted to patrons at various computers or lent through an interloan agreement. However, with regards to the preservation functions of libraries and archives and the subsequent need to make copies of born-digital materials, the laws of many countries have been changing, allowing for agreements to be made between these institutions and the rights holders of born-digital content. Consumers have also had to deal with intellectual property as it concerns their ownership of and ability to control the born-digital material that they buy. Piracy proves to be a bigger problem with digital objects, including those that are born-digital, because such materials can be copied and spread in perfect condition with speed and distance on a scale inconceivable for traditional print and physical materials. Again, the first-sale doctrine, which, from a consumer standpoint, allows purchasers of materials to sell or give away items (such as books and CDs), is not yet applied effectively to digital objects. Three reasons for this have been identified by Victor Calaba: "...first, license agreements imposed by software manufacturers typically prohibit exercise of the first sale doctrine; second, traditional copyright law may not support application of the first sale doctrine to digital works; finally, the functionally prevents users from making copies of digitized works