The introduction of "AutoCAD WS" (now part of the mobile app ecosystem) allowed for basic online editing and collaboration. Technical System Requirements

Minimum 2 GB RAM (4 GB recommended for 3D modeling). Display: 1024 x 768 resolution with True Color. Risks and Limitations

Objects within an array (rectangular, polar, or path) maintain a relationship, making it easier to modify the entire pattern at once.

Windows XP (SP3), Vista (SP2), or Windows 7. It may run on Windows 10 with compatibility adjustments, though it often crashes upon closing.

To run AutoCAD 2012 Portable, you'll need:

AutoCAD 2012 uses the DWG 2010 file format. While it can open older files, it cannot natively open files saved in newer formats (AutoCAD 2013 and newer use the 2013 format, and modern versions use newer formats still). You will need to ask collaborators to "Save As" an older version for you, which disrupts workflows.