Searching for often points to a specific need: a lightweight version of a classic CAD tool that can run without a formal installation, typically hosted on cloud storage for easy access.
Often lacks official support; may have stability issues with certain Windows updates; high risk of embedded malware. System Requirements for AutoCAD 2015 --- Autocad 2015 Portable Google Drive
No installation required; works on older hardware; can be carried on a thumb drive. Searching for often points to a specific need: