The first caveman who used fire.
There are no records to determine which country first used ships to trade with.
Green rubbing alcohol is used in the same ways that regular rubbing alcohol is used. It is used for first-aid like scrapes and cuts, but generally has additives like menthol oil to smell and feel tingly and minty.
Alcohol is denatured to make it unfit for human consumption, usually by adding substances that make it taste bad or cause illness if ingested. This is done to avoid taxes and regulations that come with selling consumable alcohol.
The first currency was used in Ancient Greece by the Greeks.
The cotton gin was first used in India.
Microsoft Powerpoint was invented in the USA so that is the first country to have used it.
The country that was the first to use the computer was Germany. This computer was a binary calculator and was used to complete mathematical computations. The first computer used for breaking codes was used in England.
China
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Germany.
The Portuguese.