Historically, the 32-bit version of AutoCAD (such as AutoCAD 2015 or 2017) provided a full suite of 2D drafting tools but had significant limitations compared to 64-bit versions: Memory Restrictions
AutoCAD Portable is a portable version of the popular computer-aided design (CAD) software, AutoCAD. It's a self-contained version that can be run from a USB drive or a portable device, without requiring installation on a computer. Autocad Portable 32 Bit