There is a rule: if the sound following the article is a vowel sound , an is the correct article: an honest man. ]. The first sound is a vowel, consequently an is the correct article: an HBM amplifier.
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Yoeri Bruinsma For example, if I read HBM, I don't think of the sequence of letters, I think Hottinger Baldwin Messtechnik, which brings us back to the original problem.No, it doesn't. What you think of when you read HBM is of no consequence. When an English-speaking person sees the letters HBM, he doesn't have the vaguest idea what the letters stand for, and