Calculating machine inventor, 1642 (6)
I believe the answer is:
pascal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">calculating machine inventor 1642</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pascal that I've seen before include "Seventeenth century French physicist" , "17th century French mathematician -- SI unit of pressure" , "Unit of pressure; French scientist" , "religious philosopher" , "Unit of pressure, French philosopher and programming language" .)