Practical lists of languages to know: List 1: Java, Python, Lua, and C, or C++ List 2: Java, Perl, Ruby, C or C++. If you know well 3 out of 5 of those lan

Practical lists of languages to know: List 1: Java, Python, Lua, and C, or C++ List 2: Java, Perl, Ruby, C or C++. If you know well 3 out of 5 of those languages from each list, it will be easy to find employment anywhere. Other languages to know for fun: Ada, Lisp, Haskell, Smalltalk....