This is SuperMemo 98 for Windows (build: 9.27; 1.04 MB)(product info).
This was the most popular SuperMemo in pre incremental reading era. It does not require Internet Explorer. It would run in Windows 98 (and later).
Important! This software is freeware, and is retained at this site as a collector item only.
By ordering any of Freeware, you instantly qualify for Freeware Upgrade to newer versions.
If you would rather avoid the hassle of placing an order, go to freeware sites, and download there. For example see: SuperMemo at Freewarefiles.com