TGA is a long-used raster graphic format. It was developed by Truevision Inc. (now Pinnacle Systems) back in 1984. It was initially used by the developer only for its own graphic adapters, but gradually gained popularity (primarily in the field of video processing and animation). Widely used in computer games, where it is used to store textures (including 3D video games). The name of the format comes from Targa Graphic. TGA files may partially contain image transparency information. They can become the main one for creating GIFs.
WBMP is a raster image format that differs by using only two colors. WBMP files are a black and white bitmap image. It is a standard form for optimizing raster images for mobile devices in a single-bit color. The name is an abbreviation for Wireless Bitmap. WBMP is an analogue of the BMP graphic image format, but unlike it supports only monochrome 1-bit images. The WBMP format is widely used in mobile phones and PDAs; files of this format can be part of the forwarded SMS messages.