If I have seen further it is by standing on the shoulders of Giants -- Isaac Newton in: Letter to Robert Hooke, February 5, 1675/1676

...inspired the following variations:

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

In computer science, we stand on each other's feet. -- Brian K. Reid