Who is D.L Shell? Solution Hi friend, Donald L. Shell (March 1, 1924 – November 2, 2015) was an American computer scientist who designed the Shell sort sorting algorithm. He acquired his Ph.D. in Mathematics from the University of Cincinnati in 1959, and published the shell sort algorithm in the Communications of the ACM in July that same year. YOu can read on: https://en.wikipedia.org/wiki/Donald_Shell.