OIS 1.4
This is the state of OIS as it was maintained in a fork. That fork was used to build the package currently in the ArchLinux repository...
It is possible that other places have various states of OIS called "1.4", like the one on the OgreDeps package.
This is the last commit before @Ybalrid started maintaining the library, and it doesn't contains much of the pull request made since 2015/2016, they will be part of the next release.