It's a reference to Hungarian notation which had two forms, systems and apps. Systems notation would prefix variables with their primitive type: long lTime;

It's a reference to Hungarian notation which had two forms, systems and apps. Systems notation would prefix variables with their primitive type: long lTime; bool bPrint; Apps notation would prefix variables with something conveying a domain-specific semantic element: point ptPlayer; You aren't supposed to know what pcsnsi means because it is just a nonsense string here, but presumably has some potential apps notation meaning if used in the real world. https://en.wikipedia.org/wiki/Hungarian_notation https://en.wikipedia.org/wiki/Hungarian_notation