The compiler conforms to the American National Standard for Programming Language - C, ANSI/ISO 9899-1990. It also conforms to ISO/IEC 9899:1990, Programming Languages - C. Finally, this compiler conforms to FIPS 160. Because the compiler also supports traditional K&R C (Kernighan and Ritchie, or pre-ANSI C), it can ease your migration to ANSI/ISO C.