Lyndall F. Urwick
Lyndall Fownes Urwick was born on March 3, 1891 and died on December 5, 1983. In his time, he was a leading British thinker and consultant in the field of management. He is a co-author together with Luther Gulick of the concept of management functions POSDCoRB.
He is an author of an influential book The Elements of Business Administration where he integrated the ideas of earlier theorists like Henri Fayol.