The word “biolistic” was coined from the words “biological” and “ballistic” (pertaining to a projectile fired from a gun). Used to shoot pellets that are coated with genes (e.g., for desired traits) into plant seeds or plant tissues, in order to get those plants to then express the new genes. The gun uses an actual explosive (.22 caliber blank) to propel the material. Steam may also be used as the propellant. The Biolistic Gene Gun was invented in 1983-1984 at Cornell University by John Sanford, Edward Wolf, and Nelson Allen. It and its registered, trademark are now owned by E. I. du Pont de Nemours and Company.