25 Years Of Excellence
Tandem Nonstop Solutions By Castle Systems
Quality NonStop Solutions

About Us

Since our founding in 1994, Castle Systems, Inc. has specialized in the purchase and resale of HP Nonstop (Tandem) computer hardware. Over the last two decades we have sold and serviced every platform from the original Tandem NSI systems, through the Compaq years all the way to today's Nonstop Blade systems.

Our goal is to provide the highest quality products at the best possible price with the industry's most reliable delivery. Our inventory includes more than 12,000 parts and peripherals. We also have complete systems for sale, lease or rent.

Our comprehensive testing procedures insure that all equipment we ship is working and up to manufactures specifications. With partners around the globe Castle Systems, Inc. is positioned to help with any of your HP Nonstop hardware, software or service needs.

We also sell Medical Imaging Equipment.

Copyright © 2021 Castle Systems, Inc.
33801 Curtis Blvd, #114
Eastlake, OH 44095