Paris-based Chorus Systemes SA will reveal a multi-million deal with one of the world’s largest telecommunications equipment suppliers this Wednesday for its microkernel operating system that includes Unix compatibility: current Chorus customers include Unisys Corp, GEC-Plessey Telecommunications Ltd, Intel Corp’s supercomputer division and Inmos International Ltd – so is the new one to be Alcatel NV, Siemens AG or Northern Telecom Ltd?