← Open Interactive Timeline Board

2.2.1.1 Artificial Intelligence

Encyclopedia/2. Technology & The Built World/1. Computing, AI & Information Technology/01. Hardware & Electronics  •  Curated by Admin Timeline.sg

Machine learning · Neural architectures · Natural language processing

Chronological Storyline (25 Milestones)

2500 BCE

Mesopotamian abacus emerges

The earliest counting boards appear in Mesopotamia, providing a tangible tool for arithmetic that would influence computational aids for millennia across civilizations. · Wikipedia: https://en.wikipedia.org/wiki/Abacus

Line art drawing of an abacus
Line art drawing of an abacus
By Pearson Scott Foresman - This image has been extracted from another file, Public domain, https://commons.wikimedia.org/w/index.php?curid=3503686
500 BCE

Panini formalizes Sanskrit grammar

The Indian scholar Panini produces the Ashtadhyayi, a rigorous formal grammar of Sanskrit with production rules that anticipate modern formal-language theory and computational linguistics. Source — Wikipedia:

200 BCE

Chinese counting rods in use

Counting rods are used in China for positional decimal arithmetic and solving linear equations, representing one of the earliest systematic mechanical aids for mathematical computation. Source — Wikipedia:

Drawing of Pascal's Triangle published in C.E.1303 by Zhu Shijie (C.E.1260-1320), in his Si Yuan Yu Jian. It was called Jia Xian triangle or Yanghui Triangle by the Chinese, after the mathematician Jia Xian & Yang Hui.
Drawing of Pascal's Triangle published in C.E.1303 by Zhu Shijie (C.E.1260-1320), in his Si Yuan Yu Jian. It was called Jia Xian triangle or Yanghui Triangle by the Chinese, after the mathematician Jia Xian & Yang Hui.
By Yáng Huī (楊輝), ca. 1238–1298) - w:en:Image:Yanghui_triangle.gif, Public domain, https://commons.wikimedia.org/w/index.php?curid=1189650
820 CE

al-Khwarizmi systematizes algebra

Persian scholar al-Khwarizmi writes Al-Jabr, formalizing algebraic methods of solving equations; his name gives us the word 'algorithm,' foundational to all computer science. · Wikipedia: https://en.wikipedia.org/wiki/Muhammad_ibn_Musa_al-Khwarizmi

Monumento a Muhammad al-Juarismi en la Ciudad Universitaria de Madrid
Monumento a Muhammad al-Juarismi en la Ciudad Universitaria de Madrid
By Zarateman - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=162213187
1206 CE

al-Jazari builds programmable automata

Arab engineer al-Jazari designs a musical automaton with adjustable camshafts, an early example of programmable mechanical control described in his Book of Knowledge of Ingenious Mechanical Devices. · Wikipedia: https://en.wikipedia.org/wiki/Ismail_al-Jazari

The elephant clock from Al-Jazari's manuscript.
The elephant clock from Al-Jazari's manuscript.
By Al-Jazari - http://www.muslimheritage.com/topics/default.cfm?ArticleID=466, Public domain, https://commons.wikimedia.org/w/index.php?curid=4173094
1936 CE

Turing defines universal computation

Alan Turing publishes 'On Computable Numbers,' defining the universal Turing machine and establishing the mathematical foundations for all general-purpose computation. · Wikipedia: https://en.wikipedia.org/wiki/Turing_machine

Turing Machine, reconstructed by Mike Davey as seen at Go Ask ALICE at Harvard University
Turing Machine, reconstructed by Mike Davey as seen at Go Ask ALICE at Harvard University
By Rocky Acosta - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=24369879
1943 CE

McCulloch and Pitts model neurons

Warren McCulloch and Walter Pitts propose the first mathematical model of a biological neuron, showing that networks of such units can in principle compute any logical function. · Wikipedia: https://en.wikipedia.org/wiki/McCulloch%E2%80%93Pitts_neuron

Atrificial neuron structure
Atrificial neuron structure
By Funcs - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=148910507
1950 CE

Turing proposes the imitation game

Alan Turing publishes 'Computing Machinery and Intelligence,' introducing the Turing Test as a criterion for machine intelligence and framing the question 'Can machines think?' · Wikipedia: https://en.wikipedia.org/wiki/Turing_test

Diagram of the Turing test. This file was derived from: Test de Turing.jpg:
Diagram of the Turing test. This file was derived from: Test de Turing.jpg:
By Juan Alberto Sánchez Margallo - File:Test_de_Turing.jpg, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=57298943
Jun 1, 1956 CE

Dartmouth Conference founds AI

John McCarthy, Marvin Minsky, Claude Shannon, and Nathaniel Rochester organize the Dartmouth Summer Research Project, coining the term 'artificial intelligence' and establishing it as a field. Source — Wikipedia:

1958 CE

Rosenblatt invents the perceptron

Frank Rosenblatt introduces the perceptron, the first trainable neural network model, enabling machines to learn binary classification from data. Source — Wikipedia:

1966 CE

Weizenbaum creates ELIZA chatbot

Joseph Weizenbaum at MIT builds ELIZA, a natural language processing program that simulates a Rogerian psychotherapist and demonstrates surprisingly human-like conversational ability. · Wikipedia: https://en.wikipedia.org/wiki/ELIZA

A conversation with the ELIZA chatbot.
A conversation with the ELIZA chatbot.
By Unknown author - File:ELIZA conversation.jpg, Public domain, https://commons.wikimedia.org/w/index.php?curid=99305439
1969 CE

Minsky and Papert limit perceptrons

Marvin Minsky and Seymour Papert publish 'Perceptrons,' proving single-layer networks cannot solve XOR and contributing to reduced neural network funding for years. Source — Wikipedia: )

1980 CE

Fukushima proposes Neocognitron

Kunihiko Fukushima introduces the Neocognitron, a hierarchical multilayer neural network inspired by visual cortex that is a direct precursor to convolutional neural networks. · Wikipedia: https://en.wikipedia.org/wiki/Neocognitron

1986 CE

Backpropagation popularized

David Rumelhart, Geoffrey Hinton, and Ronald Williams publish the backpropagation learning algorithm, enabling effective training of multi-layer neural networks and reviving the field. · Wikipedia: https://en.wikipedia.org/wiki/Backpropagation

May 11, 1997 CE

Deep Blue defeats world chess champion

IBM's Deep Blue defeats Garry Kasparov, marking the first time a machine beats a reigning world chess champion under tournament conditions and a milestone in game-playing AI. Source — Wikipedia: )

Deep Blue, a computer similar to this one defeated chess world champion Garry Kasparov in May 1997. It is the first computer to win a match against a world champion. Photo taken at the Computer History Museum.
Deep Blue, a computer similar to this one defeated chess world champion Garry Kasparov in May 1997. It is the first computer to win a match against a world champion. Photo taken at the Computer History Museum.
By James the photographer - https://www.flickr.com/photos/22453761@N00/592436598/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=3511068
Deep Blue vs Kasparov: How a computer beat best chess player in the world - BBC News
Deep Blue vs Kasparov: How a computer beat best chess player in the world - BBC News
1997 CE

Hochreiter proposes LSTM networks

Sepp Hochreiter and Jürgen Schmidhuber introduce Long Short-Term Memory networks, solving the vanishing gradient problem and enabling recurrent networks to learn long-range dependencies. · Wikipedia: https://en.wikipedia.org/wiki/Long_short-term_memory

Precise visual depiction of a LSTM Cell.
Precise visual depiction of a LSTM Cell.
By Leouscin - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=179763179
Feb 16, 2011 CE

Watson wins Jeopardy!

IBM's Watson defeats human champions Ken Jennings and Brad Rutter on Jeopardy!, demonstrating advanced natural language understanding and question-answering at scale. Source — Wikipedia:

An early prototype of Watson in Yorktown Heights, NY. The cognitive computing system was originally the size of a master bedroom in 2011.
An early prototype of Watson in Yorktown Heights, NY. The cognitive computing system was originally the size of a master bedroom in 2011.
By Clockready - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=15891787
Watson and the Jeopardy! Challenge
Watson and the Jeopardy! Challenge
Sep 30, 2012 CE

AlexNet wins ImageNet competition

Alex Krizhevsky, Ilya Sutskever, and Geoffrey Hinton's AlexNet wins the ImageNet competition by a large margin, igniting the deep learning revolution through GPU-trained convolutional networks. · Wikipedia: https://en.wikipedia.org/wiki/AlexNet

AlexNet block diagram
AlexNet block diagram
By Zhang, Aston and Lipton, Zachary C. and Li, Mu and Smola, Alexander J. - https://github.com/d2l-ai/d2l-en, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=152265712
2014 CE

Goodfellow introduces GANs

Ian Goodfellow and colleagues invent Generative Adversarial Networks, pitting generator against discriminator to produce realistic synthetic data and advancing generative modeling. · Wikipedia: https://en.wikipedia.org/wiki/Generative_adversarial_network

Generative adversarial network
Generative adversarial network
By Zhang, Aston and Lipton, Zachary C. and Li, Mu and Smola, Alexander J. - https://github.com/d2l-ai/d2l-en, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=152265649
Mar 15, 2016 CE

AlphaGo defeats Lee Sedol

DeepMind's AlphaGo defeats world champion Lee Sedol in Go, a game long thought resistant to AI, using deep reinforcement learning and Monte Carlo tree search. · Wikipedia: https://en.wikipedia.org/wiki/AlphaGo

Match 1 - Google DeepMind Challenge Match: Lee Sedol vs AlphaGo
Match 1 - Google DeepMind Challenge Match: Lee Sedol vs AlphaGo
Jun 1, 2017 CE

Transformer architecture published

Ashish Vaswani and colleagues at Google publish 'Attention Is All You Need,' introducing the Transformer architecture that enables parallel training and revolutionizes natural language processing. · Wikipedia: https://en.wikipedia.org/wiki/Transformer_(deep_learning_architecture)

Illustrations for the Transformer, and attention mechanism. Transformer, full architecture.
Illustrations for the Transformer, and attention mechanism. Transformer, full architecture.
By dvgodoy - https://github.com/dvgodoy/dl-visuals/?tab=readme-ov-file, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=151216016
Jun 1, 2018 CE

BERT transforms language understanding

Jacob Devlin and colleagues at Google release BERT, a bidirectional Transformer model that sets new state-of-the-art results across natural language understanding benchmarks. · Wikipedia: https://en.wikipedia.org/wiki/BERT_(language_model)

Jun 1, 2020 CE

GPT-3 demonstrates few-shot learning

OpenAI releases GPT-3, a 175-billion-parameter language model that demonstrates remarkable few-shot learning across diverse natural language tasks, showcasing emergent capabilities of scale. · Wikipedia: https://en.wikipedia.org/wiki/GPT-3

Nov 30, 2022 CE

ChatGPT brings conversational AI to millions

OpenAI launches ChatGPT, a conversational interface to GPT-3.5 that reaches 100 million users in two months and makes large language models a mainstream technology. Source — Wikipedia:

OpenAI's blossom logo, used since February 2025
OpenAI's blossom logo, used since February 2025
By OpenAI - This file was derived from: OpenAI logo 2025.svg, Public domain, https://commons.wikimedia.org/w/index.php?curid=159145630
The ChatGPT Revolution | CBS Reports
The ChatGPT Revolution | CBS Reports
Mar 14, 2023 CE

GPT-4 released with multimodal capability

OpenAI releases GPT-4, a multimodal model that accepts both text and images while achieving human-level performance on many professional and academic benchmarks. Source — Wikipedia: