CSN Integrates IntelliMine® Suite at Casa De Pedra

Tucson, Arizona – October 22, 2008 Modular Mining Systems, Inc., the market leader in information management solutions for mining operations worldwide, announces that Companhia Siderúrgica Nacional (CSN) will implement the Modular IntelliMine® integrated asset management suite at their Casa de Pedra iron ore mine in Brazil.

The installation will consist of the DISPATCH®, MasterLink®, and PowerView™ solutions, including Fleet Management and Crew Management modules. Together, these systems will provide optimized productivity, enhanced site-wide communication, and powerful reporting to Casa de Pedra.

Casa de Pedra is in the midst of a significant project that will increase iron ore production. CSN concluded that implementation of the IntelliMine® suite provides the best return on investment. Modular solutions will replace other mine management technology currently operating onsite.

About Companhia Siderúrgica Nacional

Founded in 1941, CSN became the first integrated flat steel producer in Brazil. As one of the largest steel companies in Latin America, CSN looks to expand fleet size in 2009 to achieve a production goal of 40 million tonnes. Casa de Pedra, located near the city of Congonhas in Brazil, accounts for the entire CSN iron ore supply and produced 15 million tonnes in 2007. For more information, visit the CSN website at http://www.csn.com.br.

About Modular Mining Systems, Inc.

Modular is the market leader in providing powerful information management solutions to meet the needs of both open pit and underground mining operations worldwide. Modular sales and support offices are located in all key world-mining markets.