MS-DOS 2.11 for Tiki-100 8/16 rev. C
Released in 1988 by Microsoft
For Tiki-100 revision C computers with the 8/16 add-on.

This is the special version of MS-DOS required to operate a Tiki-100
Rev. C computer with its 8/16 8088 CPU add-on board.

This machine is not IBM PC compatible, and this port of DOS will not 
work on IBM PCs or clones.

Source: http://www.djupdal.org/tiki/program/