PCX: Windows Paintbrush bitmap image standard.

Pict: The native bitmapped file format for Macintosh&153; images.

Pict 2: The native color bitmapped image format for Macintosh&153;, up to 32 bit color.

Pixel: The pixel is the smallest part of a digitized or Digital Image. Also used in measuring image size and resolution, i.e., 640 x 480 is the pixel resolution of most VGA Monitors. (Note pixels are square in computers and rectangular in video)

Pixelization: The stair-stepped appearance of a curved or angled line in digital imaging. The smaller the pixels, and the greater their number, the less apparent the "pixelization" of the image. Also known as the "jaggies".

Plug-In: The plug-in architecture was first popularized by Adobe Photoshop and is now the defacto standard for all major imaging programs. Unlike Twain it allows more flexibility in design so acquire, export, and specific task can be performed with in a software application. This is the preferred choice of operation in the Macintosh and ´Power User´ computers. Plug-In ideology has spread to other applications like Netscape Navigator, Macromedia Director, and so on. Not all plug-ins work with all products, specific interfaces are required for different types of software. Adobe has become the defacto standard for image editing software, and graphic illustration software.

PPI: Printing term for Pixels per Inch