Here, lemme see if I can help more directly... Hopefully, this will help 
move this PL/I stuff thread off the book recommendation thread. If not, 
someone with more List knowhow, please help.

In line with the new subject,  What, if any, features does PL/I have 
that are not realized in a modern language?

Thanks,

Will

On 11/24/21 4:19 PM, Charles Anthony wrote:
>
>
> On Wed, Nov 24, 2021 at 7:23 AM Richard Salz <rich.salz@gmail.com> wrote:
>
>     ....
>
>
>           Compiled by: Multics PL/I Compiler, Release 33f, of February 
> 11, 2017
>           Compiled at: Installation and location
>           Compiled on: 11/24/21  1411.5 pst Wed
>               Options: table list
>
>         1 try:proc options(main);
>         2    dcl (if,then,else) fixed binary (31);
>         3
>         4    if = 1;
>         5    then = 2;
>         6    else = 3;
>         7
>         8    if if = then then then = if; else else = then;
>         9
>        10 end try;
>
> -- Charles