• 100

# Evidence of Counting

Counting
Counting numbers
50,000 B.C.
• 101

# Metal

Metals
Metals are created and used.
Metals are used in computers.
4000 B.C
• 102

# Writing

Writing
Evidence of writing,
3,500 BC
• 103

# Bronze Age

Bronze Age
making bronze from natural ores. The Bronze Age is more advanced than the Stone Age. It was important to mankind because it allowed us to create more durable tools and artifacts for productive use.
• 104

# Hieroglyphics

hieropglyphics
Hierglyphic numerals are first used in Egypt.
• 105

# Abacus

Abacus
Also known as a counting frame.
Mechanical device used to assist a person in performing mathematical calculations.
2600 BC
• 106

Decimals
1350 BC
• 107

# Iron

iron
Iron began being developed around 2000 BC
• 440

• Jan 1, 1502

# First Mechanical Computer

Leonardo da Vinci invents the mechanical calculator.
• # The Word "Computer"

[Computer](en.wikipedia.org/wiki/Computer_(astronomer_term))
The word "computer" meant "one who computes" before the 17th century.
Now means: An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program
• # Binary Code

Gottfried Leibniz demonstrates binary arithmetic, a discovery that shows every number can be represented by 0 and 1 only.
• # Electricity

This is a key element in computers. Electricity was discovered by Benjamin Franklin. He flies a kite that collects a charge after being struck by lightning.
• # First Telegraph

First Telegraph!
The first telegraph was conceived in 1753 and built in 1774. They required 26 wires, one for each letter in the alphabet.
• # First Working Telegraph

Working Telegraph
Joseph Henry of Princeton created the first working telegraph.

Computer
• # ABC Computer

This was the first electrical digital computer. This was invented by John Atanasoff & Clifford Berry.
• # Harvard Mark 1 Computer

computerInvented by Howard Aiken & Grace Hopper. controlled by pre-punched paper tape, could carry out addition, subtraction, multiplication, division and reference to previous results. It had special subroutines for logarithms and trigonometric functions and used 23 decimal place numbers. Data was stored and counted mechanically using 3000 decimal storage wheels, 1400 rotary dial switches, and 500 miles of wire. Its electromagnetic relays classified the machine as a relay computer.
• # FORTRAN Computer Programming Language

FORTRAN Computer Programming LanguageThe first successful high level programming language. Created by John Backus & IBM
• # First Computer Game

Spacewar Computer Game
Spacewar Computer Game by Steve Russell & MIT
• # Internet

ARPAnetOriginal Internet named ARPAnet.
• # RAM

RAM
The world's first available dynamic RAM chip.
Intel 1103 Computer Memory
• # Microprocessor

The first microprocessor.
By: Faggin, Hoff & MazorIntel 4004 Computer Microprocessor
• # FLOPPY DISK

Floppy Disk
Nicknamed the "Floppy" for its flexibility.
By Alan Shugart &IBM
The "Floppy" Disk
• # Computers for Consumers

1974-1977
First computers for consumers.
Scelbi & Mark-8 Altair & IBM 5100 Computers
Apple I, II & TRS-80 & Commodore Pet Computers
• # Lisa Computer

Apple
This is the first computer with a GUI (Graphical User Interface). Created by Apple
• # Microsoft vs. Apple

Microsoft Windows begins friendly war with Apple
• # Maya and Mathematics

Mathematics
The Mayans develop base-20 system of mathematics
260 BC