The term 'ART PRINT: ABBR.' is an abbreviation for two different types of prints: Lithography and Engraving. Lithography is a printing process that uses a flat surface, usually stone or metal, to create an image. Engraving is a technique that involves cutting into a material, such as metal or wood, to create an image. Both processes are used to create art prints, which are prints of artwork that can be hung on walls or framed.