Top suggestions for 1G (first-generation mobile telecommunications): Started in the 1980s using analog signals to provide voice transmission service. 2G (second-generation mobile telecommunications): Started in the 1990s using digital radio signals. 3D printer: A printer that creates objects by adding layers of material onto one another. Also known as additive manufacturing. 3D scanner: Scanner that uses lasers, cameras, or robotic arms to record the shape of an object. 3G (third-generation mobile telecommunications): Started in the 2000s and provided services capable of effective connectivity to the Internet, marking the beginning of smartphones. 3GLs (third-generation languages): High-level procedural language. See also Procedural language. 4G (fourth-generation mobile telecommunications): Replacing 3G networks in some areas with providers using WiMax and LTE connections to provide faster transmission speeds. 4GLs (fourth-generation languages): Very high-level or problem-oriented |