XviD is a codec based on the MPEG-4 standard. The codec distorts colors but it has high definition in dynamic scenes. XviD is constantly updating because it is an open source codec and anyone who is interested can participate in the development of the program. Using XviD may be illegal in some countries because the compression methods used in MPEG-4 are patented.

Files containing the AMB extension are known as AIMMS Model Files as they refer to the models that the AIMMS (Advanced Integrated Multidimensional Modeling Software) created. The AMB file extension was developed by Paragon Decision Technology and the files with this extension are categorized as data files. The data that these AMB files contain are procedures, identifier declarations as well as core model functions. These files are also based on AIMMS modeling proprietary language wherein these files are saved with the AIMMS project (.PRJ) file it is associated with.