OpenBSD developers strive to implement solutions correctly. This means that they follow UNIX standards such as POSIX and ANSI in their implementations. They make it a strict rule to write programs in a reliable and secure manner, following programming's best current practices. Every skilled programmer knows that programs written correctly are more reliable, predictable, and secure. Many free software producers are satisfied if it compiles and seems to work, however, and quite a few commercial software companies don't give their programmers time to write code that correctly. Code in OpenBSD has been made correct by dint of much hard work, and anyone who tries to introduce incorrect code will be turned away — generally politely, and often with constructive criticism, but turned away nonetheless. And that brings us to OpenBSD's most well-known claim to fame.