The term 'Apple Application' refers to two applications developed by Apple Inc. for their products: iTunes (6 letters) and iChat (5 letters). iTunes is a media player, media library, online radio broadcaster, and mobile device management application developed by Apple. It is used to play, download, and organize digital audio and video on personal computers running the macOS and Microsoft Windows operating systems. iChat is an instant messaging software application developed by Apple for use on its Mac OS X operating system. It allows users to communicate with other users over the internet, either one-on-one or in group chats.