The first modern analog computer was a tide-predicting machine, invented by Sir William Thomson in 1872. The differential analyser, a mechanical analog computer designed to solve differential equations by integration using wheel-and-disc mechanisms, was conceptualized in 1876 by James Thomson, the brother of the more famous Lord Kelvin.
(খ) জেমস থমসন কোন বিখ্যাত ব্যক্তির ভাই ছিলেন?
Lord Kelvin