"Portable" versions are generally unofficial "repacks" created using virtualization software (like VMware ThinApp). Using these may violate Microsoft's End User License Agreement (EULA).
Microsoft Office 2003 Portable: The Ultimate Lightweight Productivity Tool Microsoft Office 2003 Portable Download WORK
While Microsoft Office 2003 remains a nostalgic favorite for its classic menu-driven interface, modern users seeking a "portable download" should prioritize understanding the technical limitations and substantial security risks involved. What is Microsoft Office 2003 Portable? What is Microsoft Office 2003 Portable
Since Microsoft ended support for Office 2003 in 2014, it is no longer available for official download from their website. You can find archived versions or help through the following channels: To open modern
Office 2003 uses .doc , .xls , and .ppt formats. To open modern .docx or .xlsx files, you must install the Microsoft Office Compatibility Pack .