[3] (Modern Greek continues to lack a letter for the voiced bilabial plosive and transliterates such sounds from other languages using the digraph/consonant cluster ⟨μπ⟩, mp.)

Beorc dates to at least the 2nd-century Elder Futhark, which is now thought to have derived from the Old Italic alphabets' ⟨ 𐌁 ⟩ either directly or via Latin ⟨⟩.

These Old English Latin alphabets supplanted the earlier runes, whose use was fully banned under King Canute in the early 11th century.

Following the advent of printing in the 15th century, the Holy Roman Empire (Germany) and Scandinavia continued to use forms of blackletter (particularly Fraktur), while England eventually adopted the humanist and antiqua scripts developed in Renaissance Italy from a combination of Roman inscriptions and Carolingian texts.

This occurs particularly in words ending in ⟨mb⟩, such as lamb and bomb, some of which originally had a /b/ sound, while some had the letter ⟨b⟩ added by analogy (see Phonological history of English consonant clusters).

In Estonian, Danish, Faroese, Icelandic, Scottish Gaelic and Mandarin Chinese Pinyin, ⟨b⟩ does not denote a voiced consonant.

In phonological transcription systems for specific languages, /b/ may be used to represent a lenis phoneme, not necessarily voiced, that contrasts with fortis /p/ (which may have greater aspiration, tenseness or duration).