Media: Printing and Other Devices - The CSS - page 206

Media Types
User agents are categorized by their features, or the features of the
device they're running on, into one of several media types. In some cases,
such as a desktop browser with a print preview feature, the user agent
can support multiple media types; however, only one type will be active
at any given time.
List of Media Types
■ all : Intended for all devices
■ braille : Intended for Braille tactile feedback devices
■ embossed : Intended for paged Braille printers
■ handheld : Intended for small-screen handheld devices
■ print : Intended for paged, printed media (or print preview)
■ projection : Intended for projected media
■ screen : Intended for viewing on desktop and laptop screens
■ speech : Intended for screen readers
■ tty : Intended for teletypewriters, terminals, or other devices with
a fixed-character grid
■ tv : Intended for television-based devices with lower resolution
and limited scrollability compared to screen devices
■ Media queries: Intended for a selection of media via expressions that
describe the features of the device introduced in CSS3
In practice, your typical web project will have styles targeting the media
types all , screen , print , and often handheld , while the other types will
be left to manage with the styling defined in the all type or will be left
to the default appearance.