The number frequently appears in technical manuals and professional "papers" as a section header rather than a software version:
: These are popular storage cleanup apps for mobile devices. Cleaner-App Pro 8.2.3
: CleanPro and ProCleaner perform similar tasks, such as removing junk files and clearing cache. The number frequently appears in technical manuals and
: Documents like the Vermont Comprehensive Energy Plan discuss "cleaner" energy futures and policy transitions. Cleaner-App Pro 8.2.3
If you are looking for a research paper regarding "cleaner" technologies, "useful paper" might be a literal description of a document such as:
: This section in naval manuals often describes the use of paper forms (like RPCCRs) that must be completed and scanned into PDF formats for maintenance close-outs. Academic or Professional Papers