Kirshenbaum
Kirshenbaum, sometimes called ASCII-IPA or erkIPA, is a system used to represent the International Phonetic Alphabet (IPA) in ASCII. This way it allows typewriting IPA-symbols by regular keyboard. It was developed for Usenet, notably the newsgroups sci.lang and alt.usage.english. It is named after Evan Kirshenbaum, who led the collaboration that created it.
The system uses almost all lower-case letters to represent the directly corresponding IPA character, but unlike X-SAMPA, has the notable exception of the letter 'r'. Examples where the two systems have a different mapping between characters and sounds are:
Kirshenbaum charts of consonants and vowels
This chart is based on information provided in the Kirshenbaum specification., It may also be helpful to compare it to the SAMPA chart or X-SAMPA chart.
Consonant chart
The IPA consonant chart, for comparison, uses many symbols that are less widely supported:
Vowel chart
The IPA vowel chart, by comparison, uses many symbols that are less widely supported: