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The articles you read in the Availability Digest result from years of experience in researching and writing a variety of technical documents and marketing content. It’s what we do best, and we provide our services to others who value high-quality content created by IT specialists. Ask us about

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About Us

The Availability Digest is published by Sombers Associates, Inc. We have been active in mission-critical, high-availability solutions for over forty years.

The Managing Editor of the Availability Digest is Dr. Bill Highleyman. Having received his Doctorate of Electrical Engineering, he brings decades of experience in the design and implementation of mission-critical computer systems. As Chairman of Sombers Associates, he has been responsible for implementing dozens of real-time mission-critical systems for companies such as Amtrak, Dow Jones, Time, McGraw Hill, Tandem, Federal Express, Chemical Bank, SIAC, Smith Kline, G. E. Credit, Southeast Bank, Harris Satellite, A. C. Nielson, and Harris Satellite.

He has published extensively on availability, performance, testing, middleware, and other technical topics. He is the author of Performance Analysis of Transaction Processing Systems, published by Prentice-Hall, and is co-author of the three-volume series, Breaking the Availability Barrier. These books are available at Amazon.com and Barnes and Noble.

Dr. Highleyman is co-inventor of "Method of increasing system availability by splitting a system," U. S. Patent No. 7,113,938; "Asynchronous coordinated commit replication and dual write with replication transmission and locking of target database on updates only," U. S. Patent No. 7,177,866; and "Split processing system for providing increased system availability," U. S. Patent No. 7,194,488. He is also co-inventor on several other patents and patent applications in the fields of continuous- and high-availability technologies.

He is past chairman of ITUG, the HP NonStop Users' Group, and is active in presenting availability seminars and providing availability consulting. Dr. Highleyman is also  a sought-after technical writer and researcher on a wide variety of technical subjects.

Dr. Highleyman can be contacted at editor@availabilitydigest.com.

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