"Excellent file compressor"
As you may or may not already know, Win RAR is a powerful compressor, that not only opens the most popular formats, but also compresses them.
RAR files can be compressed between 8 and 15% more than ZIP or ARJ files. Win RAR`s principle characteristics are a powerful compressor in general, and that of multimedia, processing of non-RAR files (ZIP, ARJ, CAB, TAR, etc), auto-decompression files (SFX), support for long file names, damaged file repair, authenticity verification, integrated comment and file encryption.
Win RAR can visualize and decompress ISO files. It also supports Joilet ISO9660 extension, and shows long file names from Joilet CD images. Thus with this program you can, for example, compress an email attachment like an image in order to make it easier to send.