"GNU" stands for, "Gimp is Not Unix." In 1985, Richard Stallman, an artificial intelligence Researcher and founder of the Free Software Foundation, adapted and modified the oft-cloned UNIX operating system into a new software program which he called GIMP. Many have since joined Stallman in developing GIMP to its present state.
GIMP shares many of the features found in Adobe Photoshop, a high-tech program costing more than $700. While GIMP is used primarily for image retouching, editing, and combining, it can also be used to create freeform drawings and basic animation.
GIMP is entirely suitable for amateur or professional work with images intended for viewing on monitors and printing on inkjet printers.