Back in the 80's, I read a book about computer programmer productivity...they tracked what programmers were doing, and how much time programmers spend each day

Back in the 80's, I read a book about computer programmer productivity...they tracked what programmers were doing, and how much time programmers spend each day doing it. They found that programmers spend 7% of their day walking. The authors of the book were jumping all over that--why, you'd get 7% more output if the programmers just sat down and did their jobs......