Short answers, pulled from the story.
The oldest known stone tools discovered in Ethiopia date back to 2.6 million years ago. Evidence suggests hominins were using stone implements to carve animal carcasses as early as 3.4 million years ago.
Assyrian King Sennacherib claimed to have invented automatic sluices and was the first to use water screw pumps capable of lifting up to 30 tons of water. These massive pumps were cast using two-part clay molds during his reign from 704 to 681 BC.
Humans are the only species known to use tools to make other tools. Chimpanzees, elephants, dolphins, sea otters, and New Caledonian crows use tools but do not manufacture tools to create other tools.
The Swiss Army knife stands as one of the earliest and most iconic examples of a multi-tool device. It incorporates several tools into a single portable device to reduce the burden on traveling crafters.
John M. Culkin famously stated that humans shape their tools and thereafter their tools shape them. Scholars have expanded this sentiment to include the idea that humans are influenced, augmented, manipulated, and even imprisoned by technology.