This is TeX, WAITS Version 0.9 (format=amfonts 82.12.8)  8 DEC 1982 21:52
**&amfonts modes
(MODES.TEX[TEX,DEK]
{vertical mode: \hbox}
{restricted horizontal mode: blank space}
{math shift character $}
{math mode: blank space}
{\vbox}
{internal vertical mode: blank space}
{\noindent}
{horizontal mode: math shift character $}
{displayed math mode: blank space}
{the letter x}
{\showlists}

### displayed math mode entered at line 5
\mathord
.\fam1 x
### internal vertical mode entered at line 4
prevdepth ignored
### math mode entered at line 3
### restricted horizontal mode entered at line 2
\glue 3.33333 plus 1.66666 minus 1.1111
spacefactor 1000
### vertical mode entered at line 0
prevdepth ignored


! OK.
l.6 x\showlists
               
? 
{math shift character $}
{horizontal mode: end-group character }}
{math mode: math shift character $}
{restricted horizontal mode: end-group character }}
{vertical mode: \vfill}
{\penalty}
{internal vertical mode: \shipout}
{blank space}
{\baselineskip}
{\box}
{\hbox}
{restricted horizontal mode: \hss}
{select font amr10}
{the character 1}
{\hss}
{end-group character }}
{internal vertical mode: end-group character }}
[1]
{blank space}
{\global}
{end-group character }}
{vertical mode: \end}

Output written on MODES.DVI[TEX,DEK] (1 page, 252 bytes).