None of these are programming languages in the sense people normally use the term (with the exception of PL/1). They are propriety frameworks and tools. Even PL

None of these are programming languages in the sense people normally use the term (with the exception of PL/1). They are propriety frameworks and tools. Even PL/1 was an IBM developed language. Proprietary frameworks, products, and tools are definitely a terrible thing to base your career on. Languages such as C, C++, Java, Ruby, etc. are a good investment.