Spreadsheets in UOS format (Unified Office Spreadsheet) can be converted, or rather re-saved to Navy DIF format (*.dif) with several, mainly OpenDocument based spreadsheet editors.
Convert Unified Office format spreadsheet file to Navy DIF spreadsheet.
We found 3 software records in the database related to .uos to .dif file format conversion.
Apple macOS / Mac OS X software - convert uos to dif on OS X
A full-featured set of office applications for Mac OS X
Convert from uos file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned uos to dif. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Multiplatform software - convert uos to dif on any platform
Full-featured spreadsheet tool from LibreOffice suite
Spreadsheet program from OpenOffice.org productivity suite