The manifest is the section of the EPUB package document that lists all the publication's resources.

MathML is a markup grammar for tagging mathmatical equations, enabling both their visual rendering and voicing for more accurate and accessible comprehension.

There are two flavours of MathML: presentation MathML, the most widely used, is designed for presenting math equations, while content MathML defines a rich element set for machine processing but is rarely produced.

Refer to the MathML 3.0 specification for more information.

Media overlays is the name for an EPUB 3 technology that describes how to synchronize text and audio playback of a publication. Media overlays allow the text to be highlighted as it is read, and can also be used to provide a purely audio playback of the content (e.g., a talking book).

Media overlays is not a new technology but simply a more descriptive name for the profile of the SMIL standard used to define this kind of playback (i.e., Media Overlay documents are just specialized SMIL documents).

Media types are a classification system used to describe different content formats. They consist of a general type (e.g., application, audio, image, text, video) separated by a slash from a more specific subtype (e.g., javascript, ogg, gif, html, mp4). The media type for HTML, for example, is text/html.

Reading systems and user agents use media types as a clue to the type of content they have to render.

The Internet Assigned Numbers Authority (IANA) maintains the official list of registered media types.