The answer is HTML
HTML which stands for Hypertext Markup language is the standard
markup language that is used to create 2-d web pages. It has codes used to
indicate styling and layout. It also lets you insert hypertext links in web
pages. Essentially, it describes the structure of web pages using markup.
<span>A batch processing system is the execution of a series of jobs in a program on a computer without manual intervention</span>
What he does, is either he emulates through a virtual machine (such as boxes and virtualbox), or he switches his OS.