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HMI
Human Machine Interface (HMI) is the user interface in a manufacturing or process control system. It provides a graphical display of an industrial control and monitoring system. An HMI typically resides in an office-based Windows computer that communicates with a specialized computer in the plant such as a programmable logic controller (PLC). HMI is now more widely used for industrial softwares (such as Ignition) that monitor and control entire plants and provide historical and statistical data. - PC Magazine Encyclopedia
HTML
HyperText Markup Language (HTML) is the authoring language used to create documents on the World Wide Web. HTML defines the structure and layout of a Web document by using a variety of tags and attributes. The correct structure for an HTML document starts with <HTML><HEAD>(enter here what document is about)<BODY> and ends with </BODY></HTML>. All the information you'd like to include in your Web page fits in between the <BODY> and </BODY> tags. - webopedia