SCO and Caldera Release Technology Preview of AIX 5L -- 64 Bit UNIX OS for Intel Itanium Processors

New Preview with Linux Affinity Targets Developers, Hardware Providers; Caldera Systems Reaffirms its Support of Unified UNIX and Linux Technologies

SANTA CRUZ, Calif.--April 23, 2001-- The Santa Cruz Operation Inc. (SCO) (Nasdaq: SCOC) and Caldera Systems Inc. (Nasdaq: CALD), Monday announced a technology preview release of AIX 5L version 5.1, a commercial 64 bit UNIX operating system for Intel(R) Itanium(TM) processors.

AIX 5L is the result of Project Monterey, a cooperative effort between SCO and IBM, to develop the next generation UNIX operating system for Intel Itanium(TM) processors.

A complementary part of the SCO server product line, AIX 5L is endorsed by several leading OEMs, ISVs and IHVs. AIX 5L enables ISVs and customers to address a range of environments from workgroup servers to the largest data center servers using a single source tree, simply by recompiling.

With its Linux affinity, AIX 5L offers a flexible environment enabling Linux applications to run on AIX 5L. This includes everything from Web server applications to 24 X 7 mission-critical enterprise applications.

"SCO is the number one worldwide provider of UNIX on Intel systems," said David McCrabb, president of SCO's server software division.

"Working with IBM, we are delivering the next generation of UNIX for Intel Itanium processors. SCO's involvement in the AIX 5L project helped ensure broad industry support because of our heritage as a leading supplier of UNIX to the OEM community and our extensive solution provider channel."

"Caldera recognizes the importance of a stable 64 bit OS as the backbone supporting mission-critical business applications on Intel platforms," said Ransom Love, president and chief executive officer of Caldera Systems.

"Offering AIX 5L to our high-end Intel OEMs and resellers allows Linux to reach another bar on the enterprise ladder. AIX 5L provides choice and flexibility for our customers while leveraging their current investments."

"The Intel Itanium processor was designed to address the requirements of high-end servers and workstations," said Victor Krutul, operating systems and application server manager at Intel. "AIX 5L provides a 64 bit UNIX OS that has the ability to fully utilize the advanced capabilities of Itanium Architecture."

"One of the keys to eBusiness profitability is extracting maximum performance from infrastructure investments," said Allan Andersen, vice president, enterprise management marketing, Computer Associates. "The combination of SCO's advanced AIX 64 bit operating system and CA's Unicenter TNG will enable companies to achieve and maintain that performance on their Itanium-based systems as the scale and intensity of eBusiness applications continue to grow."

For the technology preview release only of AIX 5L, licenses will be free of charge and will not include support. Pricing and support for future releases will be determined at the time of each such release. AIX 5L is built for Itanium(TM)-based systems and the preview release will be limited to customers with Itanium(TM)-based systems.

About The Santa Cruz Operation Inc.

With headquarters in Santa Cruz, The Santa Cruz Operation Inc. is comprised of three independent divisions -- Tarantella Inc., the server software division, and the professional services division. The server software division is a leading provider of UNIX server operating systems.

Tarantella Inc. promotes a range of software technologies and products that Web-enable any application instantly, for access by users anywhere.

The professional services division helps organizations create and deploy personalized IT strategies. The three divisions sell and support their products and services through a worldwide network of distributors, resellers, systems integrators and OEMs. For more information, visit SCO's home page at

The Santa Cruz Operation, SCO, and the SCO logo are trademarks or registered trademarks of The Santa Cruz Operation Inc. in the United States and other countries.

Caldera Systems Inc.

Caldera Systems is a "Linux for Business" leader. Caldera was the first to create the "Develop-on, Deploy-on, Manage" strategy for Linux-based clients and servers. Based in Orem, Utah, Caldera has offices and 1,000+ resellers worldwide. For more information on Caldera products and services, visit

Caldera is a registered trademark of Caldera Systems Inc. All other products, services, companies, events and publications are trademarks, registered trademarks or servicemarks of their respective owners in the United States and/or other countries.

UNIX is a registered trademark of The Open Group in the United States and other countries. Linux is a registered trademark of Linus Torvalds in the United States and other countries. All other brand or product names are or may be trademarks of, and are used to identify products or services of, their respective owners.

Forward-Looking Statements

The statements set forth above include forward-looking statements that involve risks and uncertainties. The company wishes to advise readers that a number of important factors could cause actual results to differ materially from those in the forward-looking statements.

Those factors include the failure of the products described above to operate as designed due to incompatibility with some platforms or other defects; our reliance on developers in the open source community; new and changing technologies and customer acceptance of those technologies; the company's ability to compete effectively with other companies; failure of our brand to achieve the broad recognition necessary to succeed; our reliance on third party developers of components of our software offerings; claims of infringement of third party intellectual property rights; and disruption in the company's distribution sales channel.

These and other factors, which could cause actual results to differ materially, are also discussed in the company's filings with the Securities and Exchange Commission, including its recent filings on Form 10-Q.