Modern Tech
Inventions · आधुनिक तकनीक
📋Quick Overview
This chapter covers key modern tech relevant for competitive exams. These facts about inventors, discoveries, and their contributions are frequently asked in RRB NTPC, SSC CGL, and other government exams.
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Internet: ARPANET/Vint Cerf — 1969/1983 — ARPANET → TCP/IP → Internet
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GPS: US Department of Defense — 1973 — Global Positioning System — 24 satellites
📖Modern Tech
| Invention | Inventor/Origin | Year | Significance |
|---|---|---|---|
| Internet | ARPANET/Vint Cerf | 1969/1983 | ARPANET → TCP/IP → Internet |
| GPS | US Department of Defense | 1973 | Global Positioning System — 24 satellites |
| Bluetooth | Ericsson (Jaap Haartsen) | 1994 | Short-range wireless communication |
| Wi-Fi | IEEE 802.11 committee | 1997 | Wireless local area networking |
| USB | Ajay Bhatt (Intel) | 1996 | Universal Serial Bus — data transfer & charging |
| Smartphone | IBM Simon | 1992 | First smartphone with touchscreen |
| iPhone | Steve Jobs (Apple) | 2007 | Revolutionized smartphone industry |
| Android OS | Andy Rubin (Google) | 2008 | Most used mobile OS globally |
| 3D Printing | Chuck Hull | 1986 | Stereolithography — additive manufacturing |
📝Key Points for Exam
- •Internet: ARPANET/Vint Cerf, 1969/1983, ARPANET → TCP/IP → Internet
- •GPS: US Department of Defense, 1973, Global Positioning System — 24 satellites
- •Bluetooth: Ericsson (Jaap Haartsen), 1994, Short-range wireless communication
- •Wi-Fi: IEEE 802.11 committee, 1997, Wireless local area networking
- •USB: Ajay Bhatt (Intel), 1996, Universal Serial Bus — data transfer & charging
- •Smartphone: IBM Simon, 1992, First smartphone with touchscreen