Timeline of Domestic Inventions

A nativity site caught my eye last week with information on how to make hay bales. Why would a historical scene be filled with items from the 1940's on? These kinds of odd uses of modern technology often slip past when we just don't think about what technology is used to make something or how it happens. It can be hard to sort out, so I have posted a time line useful for model makers. If you have items to add, please send them in!