I will keep updating this list of objects or practices which were once common but rarely or never appear in books, films or on TV.
1. Addiators – mechanical pocket calculators. These were made by the hundreds of thousands up to 1975. When have you seen one being used in a film or on TV? I have several posts on these.
2 Moonlight towers – an early form of street lighting. Many cities had these towers.
3 Wind or water powered sawmills – when more things [e.g. ships] were made of wood cutting planks cheaply and easily was important.