Similarly, "Hard Disk Space: 2.5 GB or more" – "Hard Disk Space" becomes disk storage.

I need to check each term and ensure all have three synonyms, and maintain the correct structure with opt1. Also, make sure names like AutoCAD remain unchanged. Let me go through the entire text again to verify. Once done, compile the result without any markdown, just the reworked text.

In the "Features of..." section: "offers a wide range of features and tools" already has synonyms earlier, so maybe rephrase again with different terms. "Land development" becomes earth construction, "civil engineering" as construction engineering, "surveying" with land mapping.

First, the title: "AutoCAD Land Desktop 2009 Free Download: A Comprehensive Guide" becomes "AutoCAD Land Desktop 2009 freeload: A thorough manual." I need to make sure each key term has three synonyms.