MultiArch (Multi-Architecture) is the capability of an Operating System (OS) to install and run applications of multiple different binary targets on the same system.
For example running a i386-linux-gnu application on an amd64-linux-gnu system.
This example is the most common case, but many other working combinations are possible, such as armel and armhf.
CodeTyphon Studio support MultiArch OS technology on all 64 bits host OSes, Windows 64, Linux 64, FreeBSD 64 and Solaris 64.
In these cases CT has Dual-Personality, 32 and 64 bits IDE, compiler debugger etc,