XDX is a registered d/b/a in Berrien Co., MI since 1985. The letters ARE the company name, a succession after SDS and XDS, not the expansion Xeith's Dehisce X. (Where the first X is a Greek Chi as in Chi-squares and the last X is the roman numeral. Dehisce requires a good dictionary and is most often used in biology. It comes from latin and means to split open. It is used in this context to refer to the major divisions of my company's interest.)

Recent company developments include a Sigma 6/7/9 emulator running CP-V on standard PC hardware. This was developed in partnership with George Plue.

June 1987 NASA Sigma 9 Computer repair. Remuneration thereto and the details.