Ever heard of Al Khwarizmi

From the intro of a new online book about algrithms , the draft was devoted to the public by its authors S. Dasgupta, C.H. Papadimitriou, and U.V. Vazirani.   

“Al Khwarizmi laid out the basic methods for adding, multiplying, and dividing numbers. even extracting square roots and calculating digits of PI. These procedures were precise, unambiguous, mechanical, efficient, correct.in short, they were algorithms, a term coined to honor the wise man after the decimal system was nally adopted in Europe, many centuries later.”