Aspirate is a name given to any sound like our h, to the letter h itself, or to any mark of aspiration, as the Greek spiritus asper, or rough breathing ('). Such characters or sounds as the Sanskritkh, gh, bh, and the Greek ch, th, ph, are called aspirates. Research Aspirate
The ISO (International Standards Organisation) assigns a two character code to each country name. These codes are used by Internet 'whois' databases (these two character abbreviations are the whois country codes) and also other applications.
BH is an abbreviation for Bahrain
BH is an abbreviation for Black Hole
BH is an abbreviation for Boot Hill
BH is an abbreviation for Bill of Health
BH is an abbreviation for Brinell Hardness Research BH