Experience of over 25 years working alongside real programmers. Must have written around 1000 lines of sode (5 -10 lines at a time) in these years. Thus can include Algol, Pascal, Ada, COBOL, Fortran, C, C++, Clipper, dBase, 6502 assembly, Java, Python, HTML, Javascript, CSS, XML, C#, Ruby, MathML, .... Can claim experience of over 15 years listening to programmers blaming defects on compilers, keyboards, and even users.