<<< tex
\begin{array}{ll}
\texttt{textrm}     & \textrm    {ABCabc} \\
\texttt{mathrm}     & \mathrm    {ABCabc} \\
\texttt{mathup}     & \mathup    {ABCabc} \\
\texttt{text}       & \text      {ABCabc} \\
\texttt{mbox}       & \mbox      {ABCabc} \\
\texttt{mathbf}     & \mathbf    {ABCabc} \\
\texttt{mathbfup}   & \mathbfup  {ABCabc} \\
\texttt{textbf}     & \textbf    {ABCabc} \\
\texttt{mathit}     & \mathit    {ABCabc} \\
\texttt{textit}     & \textit    {ABCabc} \\
\texttt{mathtt}     & \mathtt    {ABCabc} \\
\texttt{texttt}     & \texttt    {ABCabc} \\
\texttt{mathsf}     & \mathsf    {ABCabc} \\
\texttt{mathsfup}   & \mathsfup  {ABCabc} \\
\texttt{mathbb}     & \mathbb    {ABCabc} \\
\texttt{mathcal}    & \mathcal   {ABCabc} \\
\texttt{mathscr}    & \mathscr   {ABCabc} \\
\texttt{mathfrak}   & \mathfrak  {ABCabc} \\
\texttt{mathbfit}   & \mathbfit  {ABCabc} \\
\texttt{mathbfsfup} & \mathbfsfup{ABCabc} \\
\texttt{mathbfsfit} & \mathbfsfit{ABCabc} \\
\texttt{mathbfscr}  & \mathbfscr {ABCabc} \\
\texttt{mathbffrak} & \mathbffrak{ABCabc} \\
\texttt{mathbfcal}  & \mathbfcal {ABCabc} \\
\texttt{mathsfit}   & \mathsfit  {ABCabc}
\end{array}


>>> native
[ EArray
    [ AlignLeft , AlignLeft ]
    [ [ [ EText TextMonospace "textrm" ]
      , [ EText TextNormal "ABCabc" ]
      ]
    , [ [ EText TextMonospace "mathrm" ]
      , [ EStyled
            TextNormal
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathup" ]
      , [ EStyled
            TextNormal
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "text" ]
      , [ EText TextNormal "ABCabc" ]
      ]
    , [ [ EText TextMonospace "mbox" ]
      , [ EText TextNormal "ABCabc" ]
      ]
    , [ [ EText TextMonospace "mathbf" ]
      , [ EStyled
            TextBold
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbfup" ]
      , [ EStyled
            TextBold
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "textbf" ]
      , [ EText TextBold "ABCabc" ]
      ]
    , [ [ EText TextMonospace "mathit" ]
      , [ EStyled
            TextItalic
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "textit" ]
      , [ EText TextItalic "ABCabc" ]
      ]
    , [ [ EText TextMonospace "mathtt" ]
      , [ EStyled
            TextMonospace
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "texttt" ]
      , [ EText TextMonospace "ABCabc" ]
      ]
    , [ [ EText TextMonospace "mathsf" ]
      , [ EStyled
            TextSansSerif
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathsfup" ]
      , [ EStyled
            TextSansSerif
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbb" ]
      , [ EStyled
            TextDoubleStruck
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathcal" ]
      , [ EStyled
            TextScript
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathscr" ]
      , [ EStyled
            TextScript
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathfrak" ]
      , [ EStyled
            TextFraktur
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbfit" ]
      , [ EStyled
            TextBoldItalic
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbfsfup" ]
      , [ EStyled
            TextSansSerifBold
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbfsfit" ]
      , [ EStyled
            TextSansSerifBoldItalic
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbfscr" ]
      , [ EStyled
            TextBoldScript
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            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbffrak" ]
      , [ EStyled
            TextBoldFraktur
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathbfcal" ]
      , [ EStyled
            TextBoldScript
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    , [ [ EText TextMonospace "mathsfit" ]
      , [ EStyled
            TextSansSerifItalic
            [ EIdentifier "A"
            , EIdentifier "B"
            , EIdentifier "C"
            , EIdentifier "a"
            , EIdentifier "b"
            , EIdentifier "c"
            ]
        ]
      ]
    ]
]