: Minimum 2 GB, but 16 GB+ is recommended for modern stability. Storage : At least 2 GB of free hard disk space. Alternatives: Training & Study Guides
Buying AutoCAD 2012 directly is no longer possible through Autodesk as it is a "legacy" version that has reached its end-of-life. However, you can still acquire it through specific alternative methods or buy a modern subscription that includes access to older versions.
If you are looking for guides or books to learn this specific version, several highly-rated resources remain available:
: Activating 2012 can be difficult because Autodesk has retired many of its legacy activation servers. You might need to use the Manual Activation process to generate a request code. Essential Pre-Purchase Checklist