Template knot disallowed for unauthenticated users.
uses reflected, non-emitted light (i.e., E-Ink rather than LED or OLED) to display content
ideally consists of multiple pages that can be read on both sides and are bound together using special binding techniques,
is equipped with both internal and external content encoding on the front and back covers and can include an additional layer of protection (e.g., a protective cover),
has a standardized format (e.g., A5) that allows it to be easily carried in existing wearables (e.g., school bags) and stored or archived in existing furniture (e.g., bookshelves)