1 Overview
2 References
3 General principles of letter symbol standardization
3.1 Letter symbols
3.2 Alphabets and typography
3.3 Remarks concerning quantity symbols
3.4 Remarks concerning unit symbols
3.5 The International System of Units (SI)
3.6 Usage
3.7 Unit symbols to be used with limited character sets
4 Principles applicable to letter symbols and abbreviations
for quantities used in acoustics
4.1 Time-varying quantities
4.2 Average values
4.3 Quantities per unit volume, area, or length
4.4 Sequence: for double subscripts to multiplying
operators
4.5 Remarks concerning levels
4.6 Remarks concerning abbreviations
5 Introduction to the tables
6 Bibliography