IBM does not provide a standalone "Lite" edition of version 21. Instead, the full software is available for download through official IBM channels, where it can be used in trial mode or activated with a license.
First, the practical part. Official IBM support for this software ended in the early 2000s. Today, "IBM P 21 Lite" exists in the archives of retro computing forums (like Vogons or Reddit’s r/thinkpad) and Internet Archive repositories. ibm pass 21 lite download link
How to find a verified download link (safely): IBM does not provide a standalone "Lite" edition
Some popular download links for the IBM P21 Lite include: Make sure to select the correct operating system
