Iron Mountain Selected for InformationWeek 500

Iron Mountain Recognized as Industry Leader in Technology Innovation for Fourth Consecutive Year

BOSTON and MANHASSET, N.Y. - September 12, 2006 - For the fourth consecutive year, Iron Mountain Incorporated (NYSE: IRM) has been named to the InformationWeek 500, a prestigious listing of the most innovative users of information technology in the United States. The global leader in information protection and storage services was among the top companies recognized by InformationWeek at its gala awards ceremony held during this week's InformationWeek 500 Conference in Rancho Mirage, CA.

For the past 18 years, InformationWeek has identified and honored the nation's most innovative users of information technology with its annual listing. The list is unique among corporate rankings because it spotlights the power of innovation in information technology, rather than simply identifying the biggest IT spenders.

"We're very proud that Iron Mountain's innovative use of technology has been recognized by InformationWeek for the fourth consecutive year," said Kevin Roden, chief information officer for Iron Mountain. "Iron Mountain is a very diverse company, providing a wide array of records management and data protection services. In order to deliver innovative solutions to our customers, we need to implement innovative solutions in our IT infrastructure as well as in our products and services. The innovative use of technology is critical to our value proposition."

"The InformationWeek 500 honors today's leading companies who set the benchmark for business technology strategies and projects," said InformationWeek publishing director, Fritz Nelson. "The companies on our list are some of the most innovative users of technology."

Additional details on the InformationWeek 500 can be found at www.informationweek.com/iw500/.

About Iron Mountain
Iron Mountain Incorporated (NYSE:IRM) helps organizations around the world reduce the costs and risks associated with information protection and storage. The Company offers comprehensive records management and data protection solutions, along with the expertise and experience to address complex information challenges such as rising storage costs, litigation, regulatory compliance and disaster recovery. Founded in 1951, Iron Mountain is a trusted partner to more than 90,000 corporate clients throughout North America, Europe, Latin America and the Pacific Rim. For more information, visit the Company's Web site at www.ironmountain.com.

About InformationWeek
InformationWeek sets the agenda for business technology executives, covering the full range of information access points IT decision-makers use today. A trusted, authoritative source and information filter, InformationWeek helps community members understand and focus on what's important up-to-the-minute - in print, online, through independent research and at live, peer-to-peer events. Through its cross-media platform, InformationWeek delivers content to complement the print publication to its community of business technology leaders when and how they want it, 24/7. The InformationWeek community includes an audience of 2.5 million CIOs, IT executives and business managers who cut across industries, job titles, company sizes and global borders.

InformationWeek is consistently recognized for its commitment to excellence and thought leadership by the IT community, receiving many of the industry's top media accolades, including several awards from the American Society of Business Publication Editors (ASBPE), top spots in BtoB Magazine's Media Power 50 and Circulation Excellence Awards from Circulation Management Magazine.

About CMP Technology
CMP Technology is a marketing solutions company serving the technology, healthcare and lifestyles industries. Through its market-leading portfolio of trusted information brands, CMP Technology has earned the confidence of more professionals and enthusiasts in these fields than any other media company. As a result, CMP is the premier provider of access, insight and actionable programs designed to connect sellers and buyers in each of these industries in ways that yield superior return on investment. CMP Technology is a subsidiary of United Business Media (http://www.unitedbusinessmedia.com), a global provider of news distribution and specialist information services with a market capitalization of more than $3 billion.