Shoulders.

If I have seen farther than others, it is because I was standing on the
shoulders of giants.
-- Isaac Newton

In the sciences, we are now uniquely privileged to sit side by side with
the giants on whose shoulders we stand.
-- Gerald Holton

If I have not seen as far as others, it is because giants were standing on
my shoulders.
-- Hal Abelson

Mathematicians stand on each other's shoulders.
-- Gauss

Mathematicians stand on each other's shoulders while computer scientists
stand on each other's toes.
-- Richard Hamming

It has been said that physicists stand on one another's shoulders. If this is
the case, then programmers stand on one another's toes, and software
engineers dig each other's
graves .
-- Unknown