Quote from Winrar help file:
WinRAR features
·   Complete support of RAR and ZIP archives;
·   Highly sophisticated, original compression algorithm;
·   Special algorithms optimized for text, audio, graphics, 32-bit and 64-bit Intel executables compression;
·   Shell interface including drag-and-drop facility and wizard;
·   Command line interface;
·   Non RAR archives (7Z, ACE, ARJ, BZ2, CAB, GZ, ISO, JAR, LZH, TAR, UUE, Z) management;
·   Solid archiving, which can raise compression ratio by 10% - 50% over more common methods, particularly when packing a large number of small, similar files;
·   Multivolume archives;
·   Creation of self-extracting archives (also multivolume) using the default or optional SFX modules;
·   Recovering physically damaged archives;
·   Recovery volumes allowing to reconstruct missing parts of multivolume archives.
·   Unicode support in file names;
·   Other service functions, such as encryption, archive comments, error logging, etc.
So yes..
And it's
www.rarlabs.com not winrar.com