• 50,000 BCE

# Primitive Counting

Counting is introduced; fingers are used for this purpose.
• 30,000 BCE

# Recording

Paleolithic peoples notch tallies on objects in the nature world to keep track of numbers.
• 3400 BCE

# Egyptian Invention

A symbol for the number 10 is devised to facilitate counting.
• 3000 BCE

# Appearance of the Abacus

The abacus is created in China.
• 1900 BCE

# Agent of Timetracking

Stonehenge is possibly used as a calendar.
• 1350 BCE

# The First Decimal

The Chinese introduce the decimal.
• 260 BCE

# Base-20 System and Zero

The Mayan civilization develop the base-20 system, thereby bringing zero into existence.
• # Baconian Cipher

The Laconian Cipher is created, which encodes messages in A's and B's.
• # "Computer" Coined

The term "computer," delineating one who calculated and computed instead of the present day definition of a device that computed, is first recorded.
• # Logarithms

John Napier outlines the break-through idea of logarithms.
• # Napier's Bones

John Napier devised a system called "Napiers Bones," which multiplied by adding numbers and divided by subtracting.
• # Mechanical Calculating Machine

Germanys Wilhelm Schickard introduces the first known successful mechanical calculating machine, based upon the rudimentary concept thereby posed by Napier's Bones.
• # Pascaline

The mathematician Pascal invents the Pascaline, a device capable of adding, subtracting, and carrying between digits.
• # Step Reckoner

Leibniz devises the Step Reckoner, an invention capable of multiplying, dividing, and evaluating square roots.
• # Binary

Leibniz outlines binary arithmetic.
• # Semaphore Line

The semaphore line, facilitating long-distance communication, is invented by Chappe.
• # Automated Loom

Jacquard finished the invention of an automated loom, which applies punched cards to work.
• # Proto-Telegraph

A primitive telegraph type device is devised by Samuel Soemmering.
• # Arithometer

Charles Xavier Thomas de Colmar devised the "Arithometer," a break-through calculating machine, capable of all four operations.
• # Silicon

Berzelius makes the discovery of silicon, the basic component of the integrated circuit used today.
• # Photograph

Nipple takes the first recorded photograph.
• # Ohm's Law

Ohm's law is introduced.
• # American Revelation

Dyar becomes the first American to devise a proto-telegraph invention.
• # Telegraphs

Pavel Schilling is the first person to send signals from a telegraph to another.
• # Morse Code

Morse Code is devised.
• # Analytical Engine

The Analytical Engine, the first device to apply punch cards as memory and a method of programming, is introduced.
• # Telegraphic Message

Samuel Morse send the first telegraphic message: "What hath God wrought?"
• # Staffel's Calculator

In 1845, the Staffel's calculator is demonstrated.
• # DeMorgan Transformations

A set of logical operations, also known as DeMorgan transformations, is devised.
• # Typewriter

Sholes obtains a patent for a break-through typewriter.
• # Tanaka Seizo-sho

The company Tanaka Seizo-sho appears in Japan, later to become present-day Toshiba.
• # Telephone

Bell makes the first telephone call.
• # Phonograph

Edison introduces the first phonograph, which can record and replay sounds.
• # Commercial Electric Power Station

The first commercial electric power station begins to operate.
• # Edison Effect

The Edison effect is discovered.
• # Rotating Field Motor

Tesla patents the rotating field motor, which facilitates the creation and the primitive transmission of AC power.
• # Tabulating Machine

The tabulating machine is introduced.
• # Tabulating Machine Company

Hollerith commences the Tabulating Machine Company, also known as present-day IBM.
• # Electrical Logic Circuits

Tesla patents a very primitive form of electrical logic circuits.
• # Commercial Diode Vacuum Tubes

Fleming fiddles with Edison's diode vacuum tubes, leading to the introduction of a more developed introduction.
• # IBM

Present-day IBM is founded in New York.
• # Lithium Battery

Lewis begins to experiment with the lithium battery.
• # Random Access Computer Memory

The first random access computer memory is introduced, using electrostatic cathode-ray tubes for digital storage.
• # Magnetic Core

Magnetic rings are used to store information through polarity.
• # DYSEAC

DYSEAC is created; it is an early machine that can spread computing.
• # Hard Disk

A hard disk is created.
• # Atlas Supervisor

Atlas Supervisor begins.
• # SOS

SOS, SHARE Operating System, is created.
• # Compact Audio Cassette

Philips created the first compact audio cassette.
• # OS/360

OS/360 is introduced by IBM.
• # CP-40

CP-40 appears.
• # ACP

Airline Control Program is created by IBM.
• # AMD

AMD, Advance Micro Devices, is created.
• # Advanced Research Projects Agency

Advanced Research Projects Agency goes online.
• # Intel 4004

Intel 4004 is introduced.
• # E-mail

E-mail is introduced by Ray Tomlinson.
• # Data General RDOS

Data General RDOS is created.
• # TCP/IP

Transmission Control Protocol/Internet Protocol (TCP/IP) appears.
• # Developed O/S

RSX-11D, RT-11, and Alto Os appear.
• # Hydra

Hydra appears.
• # Intel 8086

Intel 8086 is created.
• # New Developments in O/S Evolution

2BSD, Apple DOS, HDOS, TRIPOS, KSOS, and MVS/System Extensions (MVS/SE) appear.
• # Motorola 68000

The Motorola 68000 is released.
• # Intel 8088

Intel 8088 is created.
• # iMAX

iMAX, the O/S for Intel's iAPX 432 capability machine, appears.
• # "Internet"

The term "Internet" is first used.
• # Domain Name System

Domain Name System is introduced, including .com and .org.
• # Windows 1.0

Windows 1.0 appears.
• # OS/2 (1.0)

OS/2 (1.0) appears.
• # Windows 2.0

Windows 2.0 appears.
• # Internet Worm

Virus called Internet Worm strikes.
• # Mac OS

Mac OS (System 6) is created.
• # WWW

World Wide Web is created.
• # New Indexing System

Wide Area Information Server is created.
• # Windows 3.1

Windows 3.1 is created.
• # MiniDisc

MiniDisc is introduced.
• # Zip

Zip drive is created.
• # Windows 95

Windows 95 appears.
• # DVD

DVD is created.
• # Windows NT 4.0

Windows NT 4.0 appears.
• # CD-RW

CD-RW is created.
• # Weblog

The term "weblog" appears when NASA's website images go viral.
• # Intel Pentium II

Intel Pentium II is created.

• # MySpace.com

MySpace.com appears.
• # Mac OS 9

Mac OS 9 is created.
• # Windows 98

Windows 98, second edition, appears.
• # Microdrive

Microdrive is created.
• # Holographism

Holographic technology is introduced.
• # Wikipedia

Wikipedia is introduced.
• # Blu Ray

Blu Ray is created.
• # HD-DVD

HD-DVD is created.

• # Windows Vista

Windows Vista is created.
• # World of Warcraft

World of Warcraft becomes a popular online game, gaining over 9M subscribers.
• # Dropbox

Dropbox is created.
• # Mac OS X v10.5

Mac OS X v10.5 is created.
• # Microsoft's Offer

Microsoft offers to buy Yahoo! for \$44.6 billion.
• # Windows Home Server

Windows Home Server is created.
• # Android 1.5

Android 1.5 is created.
• # Windows 7

Windows 7 is created.
• # Android 2.1

Android 2.1 appears.
• # Windows Phone 7

Windows Phone 7 is created.
• # Windows 8

Windows 8 is created.
• # Windows 10

Windows 10 is created.
• # Android 7.0

Android 7.0 is created.