This clause is informative.

The following acronyms and abbreviations are used throughout this ECMA Standard.

BCL -Base Class Library, which provides types to represent the built-in data types of the CLI, simple file access, custom attributes, security attributes, string manipulation, formatting, streams, and collections.

CLI -Common Language Infrastructure

CLS -Common Language Specification

IEC -the International Electrotechnical Commission

IEEE -the Institute of Electrical and Electronics Engineers

ISO -the International Organization for Standardization

The name C# is pronounced "C Sharp".

The name C# is written as the LATIN CAPITAL LETTER C (U+0043) followed by the NUMBER SIGN # (U+000D).

End of informative text.