Power of QBasic
QBasic, the MSDOS version of QuickBasic and successor to BASICA, Turbo Basic and GWBasic. There are some cool features in this language, that I think even the current ones do not directly and so easily support.
For example, there are three simple commands like Play, Sound and Beep. While Beep is supported by an escape sequence and the ASCII character code, sound and Play do not find direct equivalents in Visual Basic or even in C#.
I am trying to understand this and perhaps if you visit Experts-Exchange and particularly this page, you would find an interesting discussion on this topic.