First programming language to have an interactive shell? [closed]

Question

Out of sheer curiosity and the pursuit of trivia, I couldn't find an answer on Google quickly.

Dear fellow programmers, what is the first programming language to provide an interactive shell?

Answer 1

I can't prove other systems weren't earlier but the LISP REPL construct is one common name given to this style of interpreter.

The LISP I Programmers Manual from 1960 (PDF) includes a mention on page 2 that is apropos:

Enlargements of the basic system are available for various purposes. The compiler version of the LISP system can be used to compile S-expressions into machine code. Values of compiled functions are computed about 60 times faster than the S-expressions for the functions could be interpreted and evaluated. The LISP-compiler system uses about half of the 32,000 memory.