Modern Tech — Set 4

Correct Answer: C. IBM

• **IBM** = Developed the RAMAC 305, the first computer to use a moving-head hard disk drive. • **1956** — The year IBM introduced the RAMAC 305, marking the advent of commercial hard disk drives. • 💡 Wrong-option analysis: Intel: Known for microprocessors, not the first hard disk drive; Western Digital: A leading hard drive manufacturer, but not the first in 1956; Seagate: Another prominent hard drive company, founded much later than 1956.

Correct Answer: C. Jack Kilby

• **Jack Kilby** = Developed the first working integrated circuit while at Texas Instruments. • **1958** — The year Jack Kilby invented the first integrated circuit, a foundational breakthrough in electronics. • 💡 Wrong-option analysis: Robert Noyce: Co-founded Intel and independently developed a similar IC version shortly after Kilby; Gordon Moore: Co-founded Intel and is known for Moore's Law; William Shockley: A co-inventor of the transistor, but not the integrated circuit.

Correct Answer: A. Sputnik 1

• **Sputnik 1** = The first artificial Earth satellite, launched by the Soviet Union. • **1957** — The year Sputnik 1 was launched, initiating the Space Age and the space race. • 💡 Wrong-option analysis: Vanguard 1: The second US satellite, launched after Sputnik 1 and Explorer 1; Aryabhata: India's first satellite, launched in 1975; Explorer 1: The first successful US satellite, launched in 1958.

Correct Answer: A. Freddie Williams and Tom Kilburn

• **Freddie Williams and Tom Kilburn** = Invented the Manchester Baby, the first computer to successfully run a stored program. • **1948** — The year the Manchester Baby, pioneering the stored-program concept, was successfully operated. • 💡 Wrong-option analysis: Konrad Zuse: Created the Z3, the world's first programmable computer, but it wasn't stored-program; John von Neumann: Published the concept of stored-program architecture but did not build the first such computer; Alan Turing: A pioneer in theoretical computer science and AI, known for the Turing machine.

Correct Answer: C. 1985

• **symbolics.com** = The first registered .com domain name, established by a computer systems company. • **1985** — The specific year, March 15, when symbolics.com was registered, marking a milestone for the commercial internet. • 💡 Wrong-option analysis: 1992: Many more domains were registered by this time, but not the first; 1990: The internet was growing, but symbolics.com was already five years old; 1980: The domain name system (DNS) was still in its early stages of development.

Correct Answer: B. Thomas Newcomen

• **Thomas Newcomen** = Invented the atmospheric engine, considered the first practical steam engine. • **1712** — The year Newcomen invented his engine, primarily for pumping water out of mines. • 💡 Wrong-option analysis: George Stephenson: A railway pioneer who built steam locomotives, not the first engine; Robert Fulton: Known for developing the first commercially successful steamboat; James Watt: Significantly improved Newcomen's engine, making it more efficient and versatile.

Correct Answer: A. Magellan

• **Magellan** = Developed the NAV 1000, the first commercial handheld GPS receiver available to the public. • **1989** — The year Magellan introduced the NAV 1000, bringing GPS technology to civilian users. • 💡 Wrong-option analysis: TomTom: A later major player in consumer navigation devices, founded in 1991; Garmin: Another prominent GPS device manufacturer, founded in 1989 but released its first handheld GPS in 1990; Sony: A diversified electronics company, not primarily known for inventing the first handheld GPS.

Correct Answer: C. Grace Hopper

• **Grace Hopper** = Developed the A-0 System, considered the first compiler for an electronic computer. • **1952** — The year Grace Hopper developed the A-0 System, revolutionizing how programs were written. • 💡 Wrong-option analysis: Ada Lovelace: Considered the first computer programmer for her work on Babbage's Analytical Engine in the 19th century; Margaret Hamilton: Led the software engineering division for NASA's Apollo program; Joan Clarke: A codebreaker at Bletchley Park during WWII, colleague of Alan Turing.

Correct Answer: D. Bitcoin

• **Bitcoin** = The first decentralized digital currency, using blockchain technology for secure transactions. • **2009** — The year Bitcoin was introduced by Satoshi Nakamoto, launching the cryptocurrency era. • 💡 Wrong-option analysis: Ethereum: A later blockchain platform, introduced in 2015, enabling smart contracts; Ripple: A real-time gross settlement system, currency exchange, and remittance network, not the first decentralized digital currency; Litecoin: One of the earliest altcoins, a peer-to-peer cryptocurrency released in 2011.

Correct Answer: A. Thomas Edison

• **Thomas Edison** = Patented a long-lasting and commercially practical incandescent light bulb with a carbon filament. • **1879** — The year Edison introduced his successful incandescent light bulb, widely adopted for practical use. • 💡 Wrong-option analysis: Nikola Tesla: Known for his work on AC electrical systems and radio, but not the practical light bulb; Joseph Swan: Independently developed an incandescent light bulb around the same time as Edison, though Edison's version was more commercially viable; Humphry Davy: Demonstrated an electric arc lamp much earlier in the 19th century, but not a practical light bulb.