BURLINGTON, MA, November 8, 2004— Cognos (NASDAQ: COGN; TSX: CSN), the world leader in business intelligence (BI) and corporate performance management, today announced the availability of Cognos ReportNetT on the Red Hat Enterprise Linux platform. Cognos ReportNet is fully certified and compatible with Red Hat Enterprise Linux, having achieved Red Hat Ready status - enabling IT decision makers to integrate reporting functionality into their Linux applications. IBM supported Cognos in the development of Cognos ReportNet on the Linux platform as part of the companies' global multi-year agreement to drive business intelligence adoption in the Linux community.

"Red Hat is committed to working with industry-leading application vendors like Cognos, to assure that customers can realize the benefits of open source in an enterprise environment where cost-effective performance is critical," said Mike Evans, vice president of Partner Development, Red Hat. "Cognos' software is a great addition to the enterprise-class solutions available on Red Hat Enterprise Linux."

Red Hat extends the adoption of Linux through the company's ability to provide a stable platform that enables customers to realize the benefits of open source solutions across a complete computing infrastructure. With this certification, Cognos is expanding options for Red Hat Enterprise Linux customers by providing a variety of high value, low cost alternatives to meet their business intelligence and performance management needs. Cognos also expands its presence in the Linux marketplace gaining access to Red Hat's global marketing and sales programs, technology road maps, and developer support solutions.

Cognos ReportNet offers a complete Web-based report and query authoring environment, extensive multi-lingual support, and modem Web Services architecture to meet the needs of today's multi-national, diversified enterprises and to dramatically reduce total cost of ownership. Designed to scale to hundreds of thousands of users, Cognos ReportNet draws upon Cognos query and reporting leadership, delivering a revolution in reporting. Customers can now utilize the low-cost of Linux in combination with Cognos ReportNet to ensure 100% adoption of decision-making information into day-to-day activities - improving corporate performance.

"At Cognos, we view Linux as a strategic and important market for our customers," said Jennifer Francis, Cognos vice president of business intelligence. "Linux is now a mainstream platform, and customers are increasingly looking for greater choices. The combination of enterprise-class reporting solutions from Cognos with Red Hat Enterprise Linux provides an integrated Linux platform that enables customers to develop rich end-to-end solutions to meet industry specific needs."

ABOUT RED HAT, INC.
Red Hat, the world's leading open source and Linux provider, is headquartered in Raleigh, NC with satellite offices spanning the globe. Red Hat is leading Linux and open source solutions into the mainstream by making high quality, low cost technology accessible. Red Hat provides operating system software along with middleware, applications and management solutions. Red Hat also offers support, training and consulting services to its customers worldwide and through top-tier partnerships. Red Hat's Open Source strategy offers customers a long term plan for building infrastructures that are based on and leverage open source technologies with focus on security and ease of management. Learn more: http://www.redhat.com

ABOUT COGNOS
Cognos, the world leader in business intelligence and corporate performance management, delivers software that helps companies drive, monitor and understand corporate performance.

Cognos delivers the next level of competitive advantage - Corporate Performance Management (CPM) - achieved through the strategic application of BI on an enterprise scale. Our integrated CPM solution helps customers drive performance through planning; monitor performance through scorecarding; and understand performance through business intelligence.

Cognos serves more than 23,000 customers in over 135 countries. Cognos enterprise business intelligence solutions and services are also available from more than 3,000 worldwide partners and resellers. For more information, visit the Cognos Web site at http://www.cognos.com.