---
title: Honeywell 200 Mainframe
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# Honeywell 200 Mainframe

By John Soeder

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Cleveland Clinic installed its first computer in 1965. Even though its electronic brainpower would pale in comparison to that of a modern-day smartphone, the Honeywell 200 mainframe filled an entire room and handled a variety of tasks, spitting out everything from patient bills to insurance claims to pharmacy inventory reports. The data-processing team was led by Tom Keaty, right, seen here with programmer John Zanghi.

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### [![Quantum-Leap-Small-Thumbnail-1](https://magazine.clevelandclinic.org/hs-fs/hubfs/CC%20Magazine/Spring%202023/Cover%20Story%20-%20Quantum%20Leap/Quantum-Leap-Small-Thumbnail-1.jpg?width=242&height=214&name=Quantum-Leap-Small-Thumbnail-1.jpg) COVER STORY Quantum Leap](https://magazine.clevelandclinic.org/2023-spring/quantum-leap?hsLang=en)

### [![Feature-OrganTransplantation-Thumb-Small](https://magazine.clevelandclinic.org/hs-fs/hubfs/CC%20Magazine/Spring%202023/Feature%20-%20Raising%20the%20Bar%20for%20Organ%20Transplantation/Feature-OrganTransplantation-Thumb-Small.jpg?width=242&height=214&name=Feature-OrganTransplantation-Thumb-Small.jpg) FEATURE Raising the Bar for Organ Transplantation](https://magazine.clevelandclinic.org/2023-spring/evolution-of-an-idea?hsLang=en)

### [![Rewriting-Small-Thumbnail](https://magazine.clevelandclinic.org/hs-fs/hubfs/CC%20Magazine/Spring%202023/Feature%20-%20Rewriting%20the%20Future/Rewriting-Small-Thumbnail.jpg?width=242&height=214&name=Rewriting-Small-Thumbnail.jpg) FEATURE Rewriting the Future for Mothers and Babies](https://magazine.clevelandclinic.org/2023-spring/rewriting-the-future-for-mothers-and-babies?hsLang=en)

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