    <li>
          <b>BINARY_TO_R4</b> converts a binary representation into an R4.
        </li>
        <li>
          <b>CH_CAP</b> capitalizes a single character.
        </li>
        <li>
          <b>CH_EQI</b> is a case insensitive comparison of two characters for equality.
        </li>
        <li>
          <b>CH_INDEX_FIRST</b> is the first occurrence of a character in a string.
        </li>
        <li>
          <b>CH_INDEX_LAST</b> is the last occurrence of a character in a string.
        <