MSI is the installation type used for VMware Tools on Windows.
open-vm-tools are the open-source version of VMware Tools, may have
been packaged by the OS vendor.
OSPs are RPM or Debian packages tailored for the OS in the VM.
Tools have been installed by the tar installer.
Installation type is not known. Most likely tools have been
installed by OSPs or open-vm-tools, but a version that does
not report its install type or an install type that we do