Shoulders
"If I have not seen as far as others, it is because giants were standing on my shoulders." - Hal Abelson
"In the sciences, we are now uniquely privileged to sit side by side with the giants on whose shoulders we stand." - Holton, Gerald
"If I have seen further it is by standing on the shoulders of Giants. C; in 'Letter to Robert Hooke, February 5, 1675/1676'" - Newton, Sir Isaac (1642-1727)
"In computer science, we stand on each other's feet." - Reid, Brian K.