For North American companies, the UPC is an existing form of the GTIN. The family of data structures (not symbologies) comprising GTIN include: GTIN-12 (UPC-A): this is a 12-digit number used primarily in North America
A plateau is high, flat ground or a situation where something has stalled that was progressing forward previously. 1  An example of a plateau is a high, flat field.  An example of a plateau is a situation where no progress is being made on a project while you await funding approval.
quantum theory. A theory in physics based on the principle that matter and energy behave both as particles and as waves. According to this theory, matter and energy are composed of tiny units of electromagnetic energy called quanta.. a theory for predicting the discrete energy states of atoms and of radiation. 2. any theory that describes a force or field using the methods of quantum mechanics: a quantum theory of gravitation.