“Programs” (or Programmes) are difficult things to discuss as within Industry and Associations  the concepts are poorly though through – Little ‘clear blue water’ exists between definitions of Pgm & Project; most defnitions endure little scrutiny without collapsing due to ambiguity and waffle.
BUT
There is a useful distinction; Program MANAGEMENT is a distinct focus that is queit distinct from Project Management’s.

Thus Pgm & Pjt are the same but PjM & PgmM are not the same.

Thougts explored in www.logicalmodel.net/pmngt/index.html