In 1843, Ada Lovelace published notes on Charles Babbage's proposed Analytical Engine, a mechanical general-purpose computer that was never actually built in her lifetime. What is she most credited with, based on those notes?
- Writing what is widely considered the first published algorithm intended to be carried out by a machine, for computing a sequence of Bernoulli numbers
- Physically building the first working general-purpose computer using gears and steam power
- Inventing the modern binary number system that all computers now use internally
- Coining the term 'computer' to describe a machine rather than a human calculator
Why A? And why not the others?
Correct answer: A. Writing what is widely considered the first published algorithm intended to be carried out by a machine, for computing a sequence of Bernoulli numbers
Lovelace's 1843 notes on Babbage's proposed Analytical Engine included a detailed, step-by-step method for the machine to compute a sequence of Bernoulli numbers, which is widely regarded by historians of computing as the first algorithm ever published for execution by a machine; she also wrote about the idea that such a machine could one day manipulate more than numbers alone, including symbols and music, which is why she is often credited as the first computer programmer. The option about physically building a working computer is wrong because the Analytical Engine was never completed in either Babbage's or Lovelace's lifetime; no full working machine of that design existed at the time, and Lovelace's own contribution was mathematical and written, not mechanical construction. The option about inventing binary is wrong because the binary number system was formalised by the mathematician Gottfried Leibniz in the seventeenth century, long before either Lovelace or Babbage worked on the Analytical Engine. The option about coining the word 'computer' is wrong because that word originally referred to human beings who performed calculations by hand for centuries before Lovelace's time, only later shifting to mean a machine.
Source: Encyclopaedia Britannica: 'Ada Lovelace' biography