The abacus shows how numbers, letters, and signs can be stored in a binary system on a computer, or via ASCII.
ðɪ ˈæbækəs ʃˈoʊz hˌaʊ nˈʌmbɚz, lˈɛɾɚz, ænd sˈaɪnz kæn biː stˈoːɹd ɪn ɐ bˈaɪnɚɹi sˈɪstəm ˌɔn ɐ kəmpjˈuːɾɚ, ɔːɹ vˈaɪəɹ ˈæski.