The original INTERCAL-72 compiler source code has been rediscovered and shared, showcasing the esolang's unique design that parodies traditional programming languages. Created in 1972 by Don Woods and Jim Lyon, INTERCAL intentionally complicates programming with its unconventional syntax and human-like interpreter, influencing later esolang developments. The article also discusses the challenges of running the code on modern systems and highlights the differences between INTERCAL-72 and its derivatives.