This format was originally created for TARGA display boards. If you haven't seen this format before, it's probably because it is used by a small segment of the professional market, as this format is very powerfull in uqlity, but big file sized, this market works with high-end color and video. Targa does not support 32-bits CMYK. Targa supports 32-bit and 24-bit with an 8-bit alpha channel, which can be used to retrieve mask information. Many people believe that Targa is technically superior to any other format. It has become popular with the growing 3-D market because it can process all the information that 3-D images require. TIFF is probably the most popular full-color bitmap format around, supported by every PC and Mac paint program. TIFF is clearly the image format of choice. It is used as default setting for every scanning program on the market today. You may have heard that there are many different versions of TIFF. which can conceivably cause some compatibility problems when moving images between programs. To date, the only problems we have experienced with TIFF files involved saving images in 24-bit TIFF files and trying to read them on an application that doesn't offer 24-bit color support. However TIFF supports 32-bit color, don't save you rimages with this setting. unless it is specifically requested. Remember that 32-bit CMYK contains the same color information than 24-bit color. Unless your bureau specifically requests this file format, don't use it. High-end commercial printers use Scitex computers to generate color separations of images and other documents. CT stands for Continuous Tone. Because there are several restrictions regarding the transfert of images from the PC to a Scitex drive, you will probably want to consult with the person using the Scitex printer before saving to CT format. It is possible that a TIFF or JPEG format is preffered. Scitex is only available when the image is in 32-bit CMYK.