There's still a ton of BASIC code being used and maintained today. Most of it by businesses. Back in the day (70s and 80s) the class of code was known as "Busin

There's still a ton of BASIC code being used and maintained today. Most of it by businesses. Back in the day (70s and 80s) the class of code was known as "Business BASIC"; tons of compilers and interpreters geared for business use were available on all computing platforms (IIRC, there's a version of BASIC for the Cray supercomputers of the day). One very popular variant that's still sold and used today is/was known as the PICK system. It's based around a "multi-value" relational database structure (which is pretty cool all on its own - data is stored in "cubes" - rows, columns, then within each "cell" can be further dimensional data). It's main "claim to fame" was a certain level of interpreter compatibility - code from one vendor could be run on other vendor's products. PICK Basic compiled down to a bytecode which was run by an intermediate "interpreter", which was a kind of virtual machine. The bytecode looked a bit like assembler (and could be coded in directly if you really knew what you were doing). There were even a few companies that made hardware CPUs that could run the bytecode directly (instead of thru an interpreter VM). Think of it as Java before Java was a thing. There also was (is?) one of the major industrial robot arm manufacturers who sold a version of BASIC geared toward programming their robot arms; I imagine that some of that is still out there running in the "wild".