Even though the UNIX system introduces a number of innovative programs and techniques, no single program or idea makes it work well. Instead, what makes it effective is an approach to programming, a philosophy of using the computer. Although that philosophy cannot be written down in a single sentence, at its heart is the idea that:
the power of a system comes more from the relationships among programs than from the programs themselves.
- Brian Kernighan, <UNIX Programming Environment>
原文：http://www.cnblogs.com/miaoz/p/3949633.html