The use of the high level language made each programmer a factor of 5 to 10 more productive in a coding sense and more concerned with the semantics than the syntax of modules.

Design bugs are often subtle and occur by evolution with early assumptions being forgotten as new features or uses are added to systems.

The general problem with ambitious systems is complexity. [...] it is important to emphasize the value of simplicity and elegance, for complexity has a way of compounding difficulties.

To our dismay, users who had been enduring several hour waits between jobs run under batch processing were suddenly restless when response times were more than a second.

The computer field is intoxicated with change. We have seen galloping growth over a period of four decades and it still does not seem to be slowing down. The field is not mature yet and already it accounts for a significant percentage of the Gross National Product both directly and indirectly.

One is faced with a dilemma: If one places total trust in all other users, one is vulnerable to the antisocial behavior of any malicious user consider the case of viruses. But if one tries to be totally reclusive and isolated, one is not only bored, but one's information universe will cease to grow and be enhanced by interaction with others. The result is that most of us operate in a complicated trade-off zone with various arrangements of trust and security mechanisms.

Regardless of whether one is dealing with assembly language or compiler language, the number of debugged lines of source code per day is about the same!