{"id":104058,"count":494,"description":"Human-machine interface (HMI) and operator interface (OI) devices help humans monitor and change industrial or facility processes or factory automation. They began as control panels with mechanical devices, then incorporated electrical elements, including microprocessors, and often have been replaced in form and function by computers or thin-clients, often referred to as a user interfaces (UI), OI or HMI with a touch screen or touch panels (computers with a screen that actuate on contact), keyboard, mouse or keypad or voice actuation.","link":"https:\/\/www.controleng.com\/control-systems\/hmi-oi\/","name":"HMI, OI","slug":"hmi-oi","taxonomy":"category","parent":104070,"meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HMI, OI - Control Engineering<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.controleng.com\/control-systems\/hmi-oi\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HMI, OI - Control Engineering\" \/>\n<meta property=\"og:description\" content=\"Human-machine interface (HMI) and operator interface (OI) devices help humans monitor and change industrial or facility processes or factory automation. 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