It’s called and it’s a single-phase residential electric meter that’s highly precise and programmable with surge protection and the ability to independently transmit metered information to the energy company and calculate costs.
1952. A view of the first Dutch programmable computer, the Automatische Relais Rekenmachine Amsterdam or ARRA (Automatic Relay Calculator Amsterdam) at the Mathematisch Centrum in Amsterdam. Due to reliability problems, the ARRA was soon taken out of commission and replaced with the ARRA II, which was actually a completely new design. In December 1953 the ARRA II ran its first test programs and in 1954 it was completed. Photo AHF, Collectie IISG / Ben van Meerendonk. #amsterdam #1952 #ARRA