Computer History - B.C. - A.D. 1000

Year	Event
50,000 B.C.	The first evidence of counting is dated back around 50,000 B.C.
30,000 B.C.	Paleolithic peoples in Europe record numbers by notching tallies on bones, ivory, and stone.
4000 B.C.	Metals begin being created and used.
3500 B.C.	The first evidence of writing is dated back to around 3,500 B.C.
3400 B.C.	Egyptians develop a symbol for the number 10, making counting larger numbers easier.
3300 B.C.	The Bronze Age begins.
3000 B.C.	Hieroglyphic numerals are first used in Egypt.
2600 B.C.	Chinese introduce the abacus.
1350 B.C.	Chinese use the first decimal.
1350 B.C.	Iron begins being developed.
300 B.C.	Mathematician Euclid releases Euclid's Elements, 13 books that summarize all mathematical knowledge of the Greeks.
300 B.C.	The Salamis Tablet, Roman Calculi, and hand-abacus, much like today's abacus.
260 B.C.	The Maya develop base-20 system of mathematics, which introduce zero.
1000 A.D.	A churchman by the name of Gerbert d'Aurillac, who later becomes Pope Sylvester II, introduces the abacus and Hindu-Arabic math to Europe.