This page describes the IBM SMS card "YFH", and is part of the SMS card database
Part number: 2108591
Image courtesy of Roland Lundvall
This page created by Ken Shirriff
on Wed Sep 15 18:15:10 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.