The iAPX-86 version of Chorus Systemes SA’s Chorus/OS binary microkernel originally due by the end of 1995 has been put back to the second quarter of this year. PowerPC, Sparc, 68000 and R-series implementations will follow. Chorus reminds us that its microkernel can be found under the hood of Cray Research Inc’s Unicos/mk operating system which runs on the new Cray T3E parallel supercomputer (CI Nos 2,190, 2,786).