On Sat, 18 Mar 2017, Mary Ann Horton wrote:

>  1. Originally, our files were all plain text and we just included them in
>     the email message body.  The ~r command in Kurt Shoen's Mail program was
>     typical.  There was no name for this, we were just emailing files.

1.5 They started to include in-line shell scripts, then we piped them 
    into the "unshar" utility, which did basic security checks.

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."