Because it is proprietary software, "free" downloads found on random sites are usually abandonware
Old software doesn't get security patches. Using it in a modern, internet-facing environment can be a risk. Finding a Legitimate Copy --- Download Crystal Reports 8-5 Full Version
Since SAP (the current owner) moved on years ago, you won't find an official download link on their main site. It is officially End of Life (EOL) Compatibility: Because it is proprietary software, "free" downloads found
Calling it an "essay" might be a stretch, but if you’re looking for a breakdown of Crystal Reports 8.5 Because it is proprietary software
or, worse, bundled with malware. If your company has an old volume license, your best bet is finding the original in your internal archives or checking sites like the Internet Archive (Archive.org)