Top ten technologies ever

Some explanation first: technology is any tool that we use to achieve anything. It doesn't need to be a thing, it can be an idea or a concept. It might also be a collection of different tools or a new use for an old tool. If humans do it and other animals don't, then it is probably a technology.


So my top ten are:

language
fire (includes the fireplace, oven, kiln, furnace)
the wheel (includes all transportation - boats, trains, roads, planes)
the written word (includes the printing press)
mathematics
agriculture (includes domestication of animals, fishing)
sanitation (includes running water)
metallurgy
the house (shelter)
the village (includes the town, the city)

Notice how the most powerful ones are the most pervasive - and we just take them for granted.

Another ten:

trade (includes money)
the nail (also the screw)
the electric plug
pottery
the clock (measuring time)
the compass
the transistor
the telegraph (includes the telephone)
radio (the use of radio waves)
refrigeration

So what have I missed?

Third-world kids don't need laptops, just make sure they have access to the technologies above first.