Pirelli evaluated the SGI Altix 350 system against traditional "white box"
clusters ."

SILICON GRAPHICS | The Source of Innovation and Discovery(TM)
SGI, also known as Silicon Graphics, Inc., is a leader in high-performance
computing, visualization and storage. Whether it's sharing images to aid in brain surgery, finding oil
more efficiently, studying global climate , providing technologies for homeland
security and defense or enabling the transition from analog to digital
broadcasting, SGI is dedicated to addressing the next class of challenges for
scientific , engineering and creative users. All other trademarks mentioned herein are
the property of their respective owners. Hood attended the California Institute of Technology
and received his MD from the Johns Hopkins School of Medicine.

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The collaboration will combine Dr.
"A key component of LabCorp's future in molecular diagnostics is our
ability to anticipate and fulfill medical needs by offering testing that can
have a significant impact on patient management," said Myla P. Hood 's extensive professional achievements include the development of
the first automated DNA sequencer and DNA synthesizer, whose use,
respectively, advanced the mapping of the human genome and proliferated the
diffusion of polymerase chain reaction (PCR) technology for molecular testing.

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(PC:MI), will use SGI(R)
server and storage technologies as tools for its advanced activities in the
field of photonics, sending communications on particles of light.
One of the world's leading makers of tires and advanced solutions for
telecommunications, Pirelli will drive its leading-edge design and analysis
efforts with a milestone system: the 1,500th SGI(R) Altix(R) server sold
worldwide.

, in the United States and/or other countries worldwide.C. Lai-Goldman,
M.

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Pirelli Labs, based in Milan, Italy, purchased a 16-processor SGI(R)
Altix(R) 350 server with 32GB of memory, the 1500th Altix sale since SGI first
launched the award-winning Altix product line in January 2003.

NOTE: Silicon Graphics, SGI, the SGI cube, the SGI logo and Altix are
registered trademarks, and The Source of Innovation is a trademark of Silicon
Graphics, Inc. A member of the National
Academy of Sciences, Dr.

Each of the above forward-looking statements is subject to change based on
various important factors, including without limitation, competitive actions
in the marketplace and adverse actions of governmental and other third-party
payors.

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D. With annual revenues of $3 . Further information on potential factors that
could affect LabCorp's financial results is included in the Company's Form 10-
K for the year ended December 31, 2004 and subsequent SEC filings.

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Working
with researchers at MIT, the company aims to utilize all of the wavelengths
available in a fiber optic cable to maximize the amount of data transmitted on
each fiber.D. Hood's
scientific vision and leadership in the field of "systems biology" with
LabCorp's vast expertise in molecular testing . in Los Angeles,
CA; ViroMed Laboratories, Inc.LabCorp.

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sgi. To learn more about
our growing organization , visit our web site at: http://www.

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The result would be a major breakthrough in the field of broadband
telecommunications. Hood, M. Actual results could differ materially from those suggested by these
forward-looking statements.

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Pirelli also purchased an SGI(R) InfiniteStorage TP9300 solution to
provide efficient management and access to design and analysis data.
"LabCorp provides a unique opportunity to test the merits of new
diagnostic approaches against the reality of the marketplace through the
application of systems biology," said Leroy E.D. based in Stratford,
CT, US LABS based in Irvine, CA, and Esoterix and its Colorado Coagulation,
Endocrine Sciences, and Cytometry Associates laboratories.

physicists biologists

"Along with SGI
InfiniteStorage solutions, Altix continues to help organizations sharpen their
competitive edge.
1,500. The goal of the new alliance
will be to develop innovative programs that accelerate the integration of
medicine and molecular diagnostics at LabCorp. LabCorp clients
include physicians, government agencies, managed care organizations,
hospitals, clinical labs , and pharmaceutical companies.

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With the
Pirelli sale, SGI Altix systems have put more than 47,800 Intel(R) Itanium(R)
2 processors in customer sites worldwide. SGI's vision is to provide technology
that enables the most significant scientific and creative breakthroughs of the
21st century., Laboratory Corporation
of America(R) Holdings (LabCorp(R)) (NYSE: LH) today announced that it has
entered into a strategic consulting relationship with world renowned molecular
biologist Leroy E. Hood, M.1 billion in 2004, approximately 24,000
employees nationwide, and more than 220,000 clients , LabCorp offers clinical
assays ranging from routine blood analyses to HIV and genomic testing.

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Together
the SGI solutions will help Pirelli engineers conduct computational fluid
dynamics and finite element analysis on new products and materials.com
650-933-4519

SGI PR HOTLINE
650-933-7777

SGI PR FACSIMILE
650-933-0283

, Ph., Ph . LabCorp
combines its expertise in innovative clinical testing technology with its
Centers of Excellence: The Center for Molecular Biology and Pathology, in
Research Triangle Park, NC; National Genetics Institute, Inc.

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He is founder
and president of the Institute for Systems Biology in Seattle , Washington.

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com.D. "A gifted innovator, Dr.

Researchers in the Applications of Mathematics.

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p.A. So it 's particularly fitting that Pirelli, with its long
history of innovation, continues its remarkable work on Altix system No.

MEDIA CONTACT
Ginny Babbitt
ginnyb@sgi.

Dr. Leroy E. Hood and LabCorp(R) Establish Collaborative Relationship

Cross-
disciplinary teams of biologists , chemists, mathematicians, physicists and
engineers study an organism's integrated and interacting network of genes,
proteins and biochemical reactions, and can use that collective knowledge to
more effectively predict, prevent or remedy diseases.

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Intel
and Itanium are registered trademarks of Intel Corporation or its subsidiaries
in the United States and other countries., Executive Vice President , Chief Scientific Officer and Medical Director
of LabCorp.

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SGI Powerful Server and Storage Technology Adopted by Pirelli for Its Advanced Labs

One of World's Largest Innovators Chooses SGI Altix

MOUNTAIN VIEW, Calif.D."
Dr.com.

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With offices worldwide, the
company is headquartered in Mountain View, Calif.

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Linux is a registered trademark of
Linus Torvalds in several countries.

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, and can be found on the Web
at http://www. BURLINGTON, N.
Unlike traditional biology, which focuses on specific, individual
functions of genes, proteins and cells, systems biology seeks a deeper
understanding of how the human body operates as a complex system. Hood's cutting-edge approach to
understanding the complex interactions of the human body will be invaluable in
helping us to identify and deliver tests and assay methods that fuel the
revolution in genomic medicine.

His many academic and professional honors include the Association for
Molecular Pathology Award for Excellence in Molecular Diagnostics, the World
Technology Award for Biotechnology, the Kyoto Prize in Advanced Technology,
the Albert Lasker Basic Medical Research Award for Studies of Immune Diversity
and the Louis Pasteur Award for Medical Innovation. based in Minneapolis, MN; The Center for
Esoteric Testing in Burlington, NC; DIANON Systems, Inc.

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, Silicon Graphics
(NYSE: SGI) today announced that Pirelli Labs, the excellence research and
development center of Italy's Pirelli + C.
Pirelli will also leverage the SGI technologies to develop a new
generation of integrated optical systems based on nanotechnologies. The large-node, global shared-memory architecture of SGI Altix, as
well as the system's superior price/performance and 64-bit Linux(R) OS
environment, proved decisive for Pirelli.
"Since its introduction, SGI Altix has increased productivity and
delivered remarkable new capabilities to customers in manufacturing, life
sciences, defense, aerospace , earth sciences and a host of other demanding
high-performance computing environments," said Jeff Greenwald, senior
director, Product Management and Marketing, SGI.

About LabCorp(R)
Laboratory Corporation of America(R) Holdings, an S+P 500 company with a
BBB investment-grade credit rating, is a pioneer in commercializing new
diagnostic technologies and the first in its industry to embrace genomic
testing.