For me, it was my fourth programming language, after BASIC, PDP-8 assembly language, ... The use of the keyword OUTFIX tells me that ChatGPT probably wrote the following code in Simula-67.

‘Programming languages’ was a course that moved like ... I got my grounding in ‘structured’ programming with Algol 68, Simula 67 and PL1 and more latterly moved on to the proliferation ...

Used for simulating system behavior in the late 1960s, SIMULA was the first object-oriented language. In the 1970s, Xerox's Smalltalk was the first object-oriented programming language, ...