When I was in the Air Force and NATO, I managed a number of programs with budgets in the tens and hundreds of millions of dollars/Euros. Now, I am still a program manager, though my budget is a fraction of those, and involves publishing books instead of building information and space systems.
Portfolios, Programs, and Projects—what's the difference?
One Man and One Dog: Lessons from Telephony
Project Scope: Mastering the Fuzzy Constraint
Portfolios, Programs, and Projects, Oh My! - Atlassian Community
Project VS. Program VS. Portfolio – Simple with Animated EXAMPLES
24 Architecture Portfolio Examples - Archifolio Blog
The Power of the Short Book: A Formula for Success
Project ≠ Program ≠ Portfolio ≠ Strategy - Henrico Dolfing
e-Portfolios at a Glance: Doctor of Pharmacy Program - UBC Centre for Teaching, Learning and Technology
The sad life of a reader
RFC 1958: An Internet Classic
Projects, Programmes and a Portfolio