Note that the ASCII character set for \*a uses both upper-case
and lower-case.

.in +6
a-z             letter
0-9             digit
\`               negative sign
\'--\'            string
C <bs> J  C     comment
.
( )
[ ; ]           indexing
L               quad
L <bs> \'        quote quad

                dyadic          monadic
                ------          -------
+               add             plus
\-               sub             negate
X               mult            sign
%               div             reciprical
|               mod             absolute value
D               min             floor
S               max             ceiling
*               pwr             exp
O <bs> *        log             ln (log base e)
O               circle funct    pi times
\&\' <bs> .        combinatorial   factorial
!               combinatorial   factorial
^               and
V               or
^ <bs> ~        nand
V <bs> ~        nor
<               lt
>               gt
$               le
&               ge
=               eq
#               ne
~                               not
?               deal            random number
R               rho             rho
I               iota            iota
E               epsilon
N               encode
B               decode
\\ <bs> O        transpose       transpose
,               catenate        ravel           *
Y               take
U               drop
{               assign
}                               goto
B <bs> N        i-beam          i-beam
L <bs> %        matrix div      matrix inverse
| <bs> H        grade up                        *
G <bs> |        grade down                      *
B <bs> J                        execute
N <bs> J                        format
/               compress                        *
/ <bs> -        compress
\\               expand                          *
\\ <bs> -        expand
O <bs> |        rotate          reverse         *
O <bs> -        rotate          reverse
op /                            reduce          *
op / <bs> -                     reduce
J.op            outer product
op.op           inner product

* may be subscripted with a scalar
<bs>  backspace (ctrl h)
.in -6