Form of the information in a communication such as literal language, digital data, and video.

One of several alternative conditions or methods of operation of a device.

A form of propagation of guided waves that is characterized by a particular field pattern in a plane transverse to the direction of propagation. Also known as transmission mode.

The mineral composition of a rock, usually expressed as percentages of total weight or volume.

A state of an oscillating system that corresponds to a particular field pattern and one of the possible resonant frequencies of the system.

The most frequently occurring member of a set of numbers.