Adobe Photoshop is a raster graphics editor developed and published by Adobe Inc. for macOS and Windows. It was originally created in 1988 by Thomas and John Knoll. Since then, it has become the de facto industry standard in raster graphics editing, to the point that it has also become a generic trademark leading to its use as a verb such as "to photoshop an image", "photoshopping", and "photoshop contest", although Adobe discourages such use.[4] Photoshop can edit and compose raster images in multiple layers and supports masks, alpha compositing, and several color models including RGB, CMYK, CIELAB, spot color, and duotone. Photoshop uses its own PSD and PSB file formats to support these features. In addition to raster graphics, Photoshop has limited abilities to edit or render text, vector graphics (especially through clipping path), 3D graphics, and video. Its feature set can be expanded by Photoshop plug-ins, programs developed and distributed independently of Photoshop that can run inside it and offer new or enhanced features.