 A "patch" is a file that can be loaded to fix problems or provide extensions to a particular version of a system.Symbolics developed a version named "Open Genera", that included a virtual machine that enabled executing Genera on DEC Alpha based workstations, plus several Genera extensions and applications that were sold separately (like the Symbolics "S-Graphics" suite).Also, they made a new operating system named "Minima" for embedded uses, in Common Lisp.