This chapter has covered nuances of the C programming language that can lead to subtle and complex vulnerabilities. This background should enable you to identify problems that can occur with operator handling, type conversions, arithmetic operations, and common C typos. However, the complex nature of this topic does not lend itself to complete understanding in just one pass. Therefore, refer back to this material as needed when conducting application assessments. After all, even the best code auditor can easily miss subtle errors that could result in severe vulnerabilities.