His signal achievement has been to bring golf into the financial big time.
But his signal achievement was prodding Goldman Sachs to go public.
In the chronicles of Western civilization, postmodern architecture deserves to be remembered for at least one signal achievement.
And that could spell trouble for one of the signal achievements of the Giuliani administration - its continuing effort to improve children's services.
But Sir Christopher's signal achievement has been to make management far more professional.
The flood of single mothers into the robust labor market is the law's signal achievement.
That of itself has been a signal achievement.
For home practitioners of artificial intelligence, it was a signal achievement.
Tribute must be paid to him for that signal achievement, which of course I hope will he the last.
The British thrust into the center of Basra is a signal achievement in its own right.