Snacc is short for "Sample Neufeld ASN.1 to C Compiler" and ASN.1 stands for Abstract Syntax Notation One (ITU-T X.208/ISO 8824). Snacc supports a subset of ASN.1 1988. If you need features of ASN.1 1992 or later, snacc is not for you. . The documentation for snacc in PostScript format and LaTeX sources.