Appendix I – References to lists of specific
abbreviations
I.1 Frequency and wavelength bands
I.2 ITU-T codes and routing codes
I.3 Codes contained in the Radio Regulations
I.4 Abbreviations used by ITU for the names of countries
I.5 Acronyms of international organizations involved in
telecommunications
I.6 Symbols and names for units
I.7 Letter symbols
I.8 Chemical symbols