As we were closing for press yesterday, Control Data Corp announced yet another disposal. It is to sell a majority stake in its training and education business – famous for the Plato system – to a new company being formed by William R Roach & Co, Chicago. Terms weren’t disclosed. The new company, in which Control Data will have a minority stake, will start life with annual turnover of about $50m. Roach said it would receive financial backing from Cherry Tree Ventures of Minneapolis and Marquette Venture Partners of Chicago for its investment. The businesses from Control Data include Plato Education Services, Plato Professional Testing & Certification Services as well as other training operations.