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150
Modern Numbers and Zero
By Aryabhata in India -
150
Abacus (2700BC)
The period 2700–2300 BC saw the first appearance of the Sumerian abacus, a table of successive columns which delimited the successive orders of magnitude of their sexagesimal number system. The earliest archaeological evidence for the use of the Greek abacus dates to the 5th century BC. -
450
Whiskey
Ireland -
500
Brandy
China -
500
Fall of The Roman Empire
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500
First Suspension Bridge
Outside Tibet and Bhutan, where the first examples of this type of bridge were built in the 15th century, this type of bridge dates from the early 19th century. This type of bridge has cables suspended between towers, plus vertical suspender cables that carry the weight of the deck below, upon which traffic crosses. -
Thermometer
Various authors have credited the invention of the thermometer to Cornelis Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. The thermometer was not a single invention, however, but a development.. -
Cheddar Cheese :D
Invented at Cheddar Gorge in 1666 Cheddar cheese is one of the most popular cheeses in the world. It accounts for 51 percent of the UKs 1.9 billion euro cheese market. In 2010 the US produced 1,443,470 tons of cheddar cheese. -
Barcode
Made by a man named Bernard Silver. He overheard a sales manager wondering about a way to automate food information reading at checkout. So he decided to try and make a way. -
Personal Computer
The personal computer was invented in 1975 by Bill Gates and Steve Jobs. The original personal computers were generally called a "Microcomputer". The first mass marketed personal computer was the commadore PET. -
Floppy Disks
The earliest floppy disks were developed in the late 1960s and were 8 inches (200 mm) in diameter. Floppy disks are used for emergency boots in aging systems lacking support for other bootable media, and for BIOS updates since most BIOS and firmware programs can still be executed from bootable floppy disks. -
International System of Units
In August of 1793, the National Convention adopted the metre with a provisional length as well as the other decimal units with preliminary definitions and terms. The history of the metric system has seen a number of variations, and has spread around the world, to replace many traditional measurement systems. At the end of World War II, a number of different systems of measurement were still in use throughout the world. But eventually eveyone switched to the SI system. Except for the US -
Rotary Grindstone
A rotary grindstone which is operated by a crank handle, is shown in the Carolingian manuscript Utrecht Psalter. The pen drawing from about 830 goes back to a late antique original. The Luttrell Psalter, dating to around 1340, describes a grindstone which was rotated by two cranks, one at each end of its axle.
