"Computer science is no more about computers than astronomy is about telescopes." - Edsger Dijkstra
Learning nothing but theory can come back to bite you some times.
After a chuckle, I showed them how to open the case and retrieve the CD.
In their capacity as a tool, computers will be but a ripple on the surface of our culture. In their capacity as intellectual challenge, they are without precedent in the cultural history of mankind.
(Turing award lecture, 1972)
As our second best DBA did when I worked at BT - he had worked at NPL and Dijkstra was his boss