What does the term refer to

In UNIX operating system what is the term Writers Workbench System means. Is it available with all systems that have UNIX operating system.

Writers workbench system is a package of programs for analyzing documents. The command used for analyzing documents or processed by writers workbench system is wwb followed by the name of the file containing the document to be analyzed. Doing this will display the analysis document in the terminal after the analysis check is done.