| | comp.software.testing Frequently Asked Questions (FAQ) (Site not responding. Last check: 2007-10-22) |
 | | Beta testing is typically conducted by end users of a software product who are not paid a salary for their efforts. |
 | | Unit testing is usually associated with structural test design, but this is because testers usually don't have well-defined requirements at the unit level to validate. |
 | | System testing specifically goes after behaviors and bugs that are properties of the entire system as distinct from properties attributable to components (unless, of course, the component in question is the entire system). |
| www.faqs.org /faqs/software-eng/testing-faq (6554 words) |