Although construction using the basic principles of MSE has a long history, MSE was developed in its current form in the 1960s. The reinforcing elements used can vary but include steel and geosynthetics. The term MSE is usually used in the US to distinguish it from "Reinforced Earth", a trade name of the Reinforced Earth Company, but elsewhere Reinforced Soil is the generally accepted term. MSE construction is relatively fast and inexpensive, and although labor-intensive, it does not demand high levels of skill. It is therefore suitable for developing as well as developed countries.