Claim: Ajami (or Ajamiyya from the Arabic root for foreign or stranger) script is an Arabic-derived African writing system, wherein ب‎ (same as b), ٻ‎ (not used in Arabic) is for Latin symbol ɓ and IPA symbol /ɓ/.
Evidence: The term Ajami (Arabic: عجمي‎, ʿajamī) or Ajamiyya (Arabic: عجمية‎, ʿajamiyyah), which comes from the Arabic root for foreign or stranger, has been applied to Arabic alphabets used for writing African languages, especially those of Hausa and Swahili, although many other African languages were written using the script, among them Yoruba, the Fulani/Pulaar of Fulfulde. It is considered an Arabic-derived African writing system. ب‎ (same as b), ٻ‎ (not used in Arabic) ɓ /ɓ/