RUL Views 15 meanings found RUL appears in tech as a shorthand for upload commands or conference rule files, in medicine to denote the right upper lobe of the lung, and as an abbreviation for institutions like Rutgers University Libraries. Medical Right Upper Lobe Right Upper eye Lid Miscellaneous Reduction under Load Reasonable Useful Lifetime Région Urbaine de Lyon Governmental Ruling Academic & Science Rutgers University Libraries Rutgers University Library Computing Ready? UP-LOAD Echo-Conference Rules file Internet Radical Unschoolers List Business Registered Unit List Runge, LTD. Remaining Useful Life Refractoriness Under Load