A software development platform, used to develop software applications substantially free of the need to write code. A performance measuring device measures performance of the communication device, and detects performance abnormality information indicating an abnormality of throughput of the communication device. A projecting layer is positioned between the electronic display and the glass layer, and comprises a plurality of microlenses for projecting the displayed image onto the projection layer. When a switch used for routing IP calls detects a telephone call to an emergency call center it determines the edge router port from which the call was placed and the telephone number associated with the port for emergency call purposes. The present invention has a simple structure and can change the load current real-timely and steadily. A control interface controls the actions of the heatingcooling system of the article and can interact with a network server to transmit measurements of environmental temperatures and occupant selection of control settings that are useful for control of the building’s indoor environment.