The typical number of characters that can be displayed in a single row on the device display. This is an estimate using the default font for the device
The maximum message size for a delivery unit supported by a user agent measured in bytes. A Delivery Unit can be defined as a set of material transferred between two cooperating programs as the response to a single request
This class represents a plugin, i.e. a software piece which extends the functionality offered by a host application (web browser, drawing application, etc)