Horizon Computer Group, the Dublin-based technology holding company, has announced a 100 per cent rise in sales to £44.9 million in the year to June 30th, 1997. No profit figures have been released but the group said its "profitability continued to be well above the industry average" with a "healthy gearing". Managing director, Mr Samir Naji, said there were "significant opportunities for further growth" in its niche British and European businesses. Founded in 1988 it has more than 100 employees.