3rd century BCE: The water wheel, a machine for converting the energy of falling water into useful forms of power was invented
2nd century BCE: Paper, a thin material used for writing, drawing, or printing on was invented .
1st BCE: Arch bridges, bridges with abutments at each end shaped as a curved arch were invented.
1st AD: A codex, which is a book constructed of a number of sheets of paper was invented.
2nd AD: Wheelbarrows, small hand-propelled vehicles, designed to be pushed using handles at the rear were invented.
3rd Century AD: Woodblock printing is a technique for printing text, images or patterns using carved wooden blocks was invented
4th: Fishing reels, cylindrical devices attached to a fishing rod used in winding and storing fishing lines were invented.
5th:Horse collars, which are used to distribute the load around a horse’s neck and shoulders when pulling a load were invented.
6th: Pendentives, architectural devices permitting the placing of a circular dome over a square room were invented
7th: Porcelain, a beatiful pottery material with strength and translucence was invented
8th: Iron horseshoes were invented
9th: Gunpowder, the earliest known chemical explosive was invented.
10th: Fireworks, explosive devices used for aesthetic, cultural, and religious purposes were invented
11th: Movable type a system of printing using movable components was invented
12th: Mariners compass, an instrument for navigational purposes at sea was invented
13th: Eyeglasses, frames bearing lenses worn in front of the eyes were invented
14th: Multistage rockets that used two or more stages, each of with its own engines and propellant were invented.
15th:A printing press is a device for mass production of written documents
16th: Mercator projection, a cylindrical map projection of the spherical Earth on a flat surface was invented.
17th:Newspapers, periodical publications containing news and other informative articles were invented
18th:The piano, a musical instrument played using a keyboard was invented
19th: Alexander Graham Bell invented the telephone, a device that helps people have conversations even when they are far apart.
20th: The World Wide Web or the Internet, a network to share digital data was invented
21st:YouTube, a video sharing website was invented by Steve Chen in 2005.