| Invention | Year | Inventor / Company | Why it matters |
|---|---|---|---|
| Binary number system | 1703 | Gottfried Leibniz | All digital data is 0s and 1s |
| Punched card | 1801 / 1890 | Jacquard / Hollerith | First data storage & input medium |
| Analytical Engine (design) | 1837 | Charles Babbage | First general-purpose computer architecture |
| Boolean logic | 1854 | George Boole | Mathematics of logic gates |
| Vacuum tube (triode) | 1906 | Lee De Forest | First electronic switch/amplifier |
| Turing machine | 1936 | Alan Turing | Theory of computation |
| Flip-flop circuit | 1918 | Eccles & Jordan | Stores one bit — basis of memory |
| Stored-program concept | 1945 | John von Neumann | Program and data in the same memory |
| Transistor | 1947 | Bardeen, Brattain, Shockley (Bell Labs) | Replaced tubes; made everything small |
| Assembler & compiler | 1949 / 1952 | Wilkes / Grace Hopper (A-0) | Programming in words, not binary |
| Magnetic core memory | 1951 | Jay Forrester, An Wang | Reliable RAM for 20 years |
| Hard disk drive | 1956 | Reynold Johnson (IBM RAMAC) | Mass storage |
| Integrated circuit | 1958 | Jack Kilby (TI), Robert Noyce (Fairchild) | Whole circuit on one chip |
| MOSFET transistor | 1959 | Atalla & Kahng (Bell Labs) | The transistor type in every chip today |
| Computer mouse | 1964 | Douglas Engelbart | Point-and-click input |
| BASIC language | 1964 | Kemeny & Kurtz | Beginner programming |
| Packet switching / ARPANET | 1965–69 | Paul Baran, Donald Davies, Leonard Kleinrock, Larry Roberts | Internet foundation |
| DRAM | 1966 | Robert Dennard (IBM) | Cheap dense memory |
| UNIX | 1969 | Ken Thompson, Dennis Ritchie | Ancestor of Linux, macOS, Android |
| Microprocessor (Intel 4004) | 1971 | Federico Faggin, Ted Hoff, Stan Mazor (Intel) | CPU on a chip |
| Floppy disk | 1971 | Alan Shugart (IBM) | Portable storage |
| E-mail & @ | 1971 | Ray Tomlinson | Electronic mail |
| C language | 1972 | Dennis Ritchie | Systems programming; OS kernels |
| Ethernet | 1973 | Robert Metcalfe (Xerox PARC) | Wired LAN |
| TCP/IP | 1974 | Vint Cerf & Bob Kahn | 'Fathers of the Internet' |
| GUI (Xerox Alto) | 1973 | Xerox PARC (Alan Kay et al.) | Windows, icons, menus, pointer |
| Laser printer | 1971–77 | Gary Starkweather (Xerox) | High-quality printing |
| Personal computer (Altair / Apple II) | 1975 / 1977 | Ed Roberts / Wozniak & Jobs | Computers at home |
| Spreadsheet (VisiCalc) | 1979 | Dan Bricklin & Bob Frankston | Business software |
| Compact Disc | 1982 | Philips & Sony | Digital optical storage (700 MB) |
| DNS | 1983 | Paul Mockapetris | Names instead of IP numbers |
| C++ | 1985 | Bjarne Stroustrup | Object-oriented systems programming |
| Windows | 1985 | Microsoft | World's most used desktop OS |
| World Wide Web (HTML, HTTP, URL) | 1989–91 | Tim Berners-Lee (CERN) | The web as we know it |
| Linux | 1991 | Linus Torvalds | Open-source OS running most servers & Android |
| Python | 1991 | Guido van Rossum | Most popular language today |
| 1993 | Adobe (John Warnock) | Universal document format | |
| Java | 1995 | James Gosling (Sun) | 'Write once, run anywhere' |
| JavaScript | 1995 | Brendan Eich (Netscape) | Language of the web |
| USB | 1996 | Ajay Bhatt (Intel) & team | Universal port — invented by an Indian engineer |
| DVD | 1996 | Philips, Sony, Toshiba, Panasonic | 4.7 GB optical disc |
| Google Search (PageRank) | 1998 | Larry Page & Sergey Brin | Organised the web |
| Wi-Fi (802.11) | 1997–99 | IEEE; Vic Hayes 'father of Wi-Fi' | Wireless networking |
| Bluetooth | 1999 | Ericsson (Jaap Haartsen) | Short-range wireless |
| USB flash drive | 2000 | M-Systems / Trek / IBM | Replaced the floppy |
| Wikipedia | 2001 | Jimmy Wales & Larry Sanger | Free encyclopedia |
| 2004 | Mark Zuckerberg | Social network | |
| YouTube | 2005 | Chad Hurley, Steve Chen, Jawed Karim | Video for everyone |
| Cloud computing (AWS EC2) | 2006 | Amazon | Rent computing power |
| iPhone | 2007 | Apple (Steve Jobs) | Modern smartphone |
| Android | 2008 | Andy Rubin / Google | Most used OS on Earth (3+ billion devices) |
| Bitcoin / blockchain | 2008–09 | Satoshi Nakamoto (pseudonym) | Decentralised digital money |
| SSD mainstream | 2008–10 | Intel, Samsung | Fast silent storage |
| Raspberry Pi | 2012 | Eben Upton (Raspberry Pi Foundation) | $35 educational computer |
| Deep learning (AlexNet) | 2012 | Krizhevsky, Sutskever, Hinton | Modern AI boom |
| Transformer architecture | 2017 | Vaswani et al. (Google) | Basis of all LLMs |
| Apple M1 (ARM Mac) | 2020 | Apple | Efficient desktop chips |
| ChatGPT | 2022 | OpenAI | AI for everyone |
| Willow quantum chip | 2024 | Google Quantum AI | Error-corrected quantum computing milestone |
Indian contributions
- IZero and decimal place-value system — Aryabhata / Brahmagupta (5th–7th century): without 0 there is no binary.
- IIPāṇini's grammar (c. 500 BC) — formal rules that inspired Backus–Naur Form used to define programming languages.
- IIIAjay Bhatt — co-inventor of USB (1996). Vinod Dham — 'Father of the Pentium'. Arun Netravali — HDTV & digital video standards.
- IVSatya Nadella (Microsoft CEO), Sundar Pichai (Google/Alphabet CEO), Shantanu Narayen (Adobe CEO), Arvind Krishna (IBM CEO).
- VRaj Reddy — Turing Award (1994) for AI & robotics. Vijay Pande — Folding@home distributed computing.
- VIPARAM 8000 (1991, C-DAC) — India's first supercomputer; PARAM Siddhi-AI (2020, 5.27 PFLOPS) and AIRAWAT (2023, 13 PFLOPS) rank in the world top 100.
- VIIAadhaar (2009) — the world's largest biometric ID database (1.3+ billion); UPI (2016) — world's largest real-time payment system (18+ billion transactions a month in 2025).
// Keep exploring
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