Answer:
PANEL:panel discussion, or simply a panel, involves a group of people gathered to discuss a topic in front of an audience, typically at scientific, business, or academic conferences, fan conventions, and on television shows.
FORUM:forum is a public discussion. It can refer to a meeting, a meeting house or any conversation that is available publicly. ... Communities, however, still hold their own forums, or meetings, usually to discuss local issues. When you see the word forum, think public conversation.
