Bull HN Information Systems Inc, the Billerica, Massachusetts-based US arm of Compagnie des Machines Bull SA, signed a multi-marketing agreement with Pyramid Technology Corp under which Bull becomes the primary distributor of Pyramid’s data centre-class MIServer ES Series in the Pick market via direct and indirect Pick channels, focussing on resellers using the uniVerse post relational database management software developed by VMark Software Inc, and the UniData relational database system developed by Unidata Inc.