An Object Oriented System Meant to Become a Successor to S3 and S4 R package S7 version 0.2.2 A new object oriented programming system designed to be a successor to S3 and S4. It includes formal class, generic, and method specification, and a limited form of multiple dispatch. It has been designed and implemented collaboratively by the R Consortium Object-Oriented Programming Working Group, which includes representatives from R-Core, 'Bioconductor', 'Posit'/'tidyverse', and the wider R community. Software Depends: R (>= 3.5.0) Imports: utils Suggests: bench, callr, covr, knitr, methods, rmarkdown, testthat (>= 3.2.0), tibble Hadley Wickham <hadley@posit.co> Comprehensive R Archive Network (CRAN) Object-Oriented Programming Working Group [cph], Davis Vaughan [aut], Jim Hester [aut] (ORCID: <https://orcid.org/0000-0002-2739-7082>), Tomasz Kalinowski [aut], Will Landau [aut], Michael Lawrence [aut], Martin Maechler [aut] (ORCID: <https://orcid.org/0000-0002-8685-9910>), Luke Tierney [aut], Hadley Wickham [aut, cre] (ORCID: <https://orcid.org/0000-0003-4757-117X>) MIT + file LICENSE (https://CRAN.R-project.org/package=S7/LICENSE) 2026-04-22 application/tgz https://CRAN.R-project.org/package=S7 doi:10.32614/CRAN.package.S7