Audible is a seller and producer of spoken audio entertainment, information, and educational programming on the Internet. Audible sells digital audiobooks, radio and TV programs, and audio versions of magazines and newspapers. Through its production arm, Audible Studios, Audible has also become the world's largest producer of downloadable audiobooks. Audible's content is usually only accessible through special proprietary closed software, including unauthorized-playback prevention by means of an Amazon account. However, due to the COVID-19 pandemic, which saw people in several countries confined to their homes, Audible made many children's and classic titles free to access via its website, with no sign-in required.