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Electrical appliances such as telephones, televisions, washing machines, vacuum cleaners, dishwashers, and refrigerators have evolved significantly over the past century. Telephones transitioned from landlines in the 1970s to cordless phones in the 1980s-1990s and then to digital cordless and mobile phones in the 21st century. Washing machines progressed from early electric models in 1907 to automatic versions in the 1950s. Vacuum cleaners were invented in 1901 and became common household items by the 1970s-1990s. Refrigerators saw widespread adoption between the 1930s-1980s.Read less