A basic principle of data processing teaches the folly of trying to maintain independent files in synchonism.

To only a fraction of the human race does God give the privilege of earning one's bread doing what one would have gladly pursued free, for passion.

Systems program building is an entropy-decreasing process, hence inherently metastable. Program maintenance is an entropy-increasing process, and even its most skillful execution only delays the subsidence of the system into unfixable obsolescence.

Plan to throw one (implementation) away; you will, anyhow.

Scientists build to learn; Engineers learn to build.

Men and months are interchangeable commodities only when a task can be partitioned among many workers with no communication among them.

Adding manpower to a late software project makes it later