This page describes the IBM SMS card "ZZD", and is part of the SMS card database.

Part number: 373698

IBM SMS card type ZZD 373698 IBM SMS card type ZZD 373698

Image courtesy of Roberto Gonzalez Rocha

This page created by Ken Shirriff on Thu Sep 16 16:40:54 2021.

The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.