If you need a that is safe and modern:
Adobe Reader 9.3 is an older version of the software known for being faster and less resource-intensive than modern "DC" versions. The edition is a "repackaged" version that: Does not require administrative privileges to run. adobe acrobat reader 93 portable
For specialized fields, 9.3 could render geospatial maps and 3D models , allowing architects and designers to share complex CAD data in a readable format. Why the "Portable" Version Endures If you need a that is safe and modern: Adobe Reader 9