CENTERLINE 2500 with ArcShield Technology. 1  Helps to reduce arc flash hazards and provide you with increased protection against internal electrical arcing faults. 2  Provides personnel and assembly protection per IEC/TR 61641:2014. 3  Includes arc-resistant latches on all doors for pressure relief to keep the door latched to the MCC during an arcing fault.
Follow Business Insider: Rob Stothard/Getty. People didn't start using the term smartphone until 1995, but the first true smartphone actually made its debut three years earlier in 1992. It was called the Simon Personal Communicator, and it was created by IBM more than 15 years before Apple released the iPhone.
IBMâs Simon Personal Communicator. The very first concept of a smartphone is said to have been envisioned back in the mid-1970s, but that idea didnât come into fruition until almost 20 years later when IBMâs Simon Personal Communicator first showed its face in 1992. Simon had a monochrome touchscreen, a stylus, and a charging base station.