1. The washing machine was invented in the late 17th century to ease the burden of manual laundry. Early models were hand-powered but mechanical innovations led to electric washing machines being advertised in 1904.
2. Washing machines provided advantages over manual laundry by saving time and effort, but also had the disadvantage of using water, electricity and other resources.
3. Different types of washing machines were developed over time, from simple wooden tubs to machines with agitators, then centrifugal spin cycles and modern controls.