Let's say you need to broadcast an event (like a convention or a conference, etc.). Then you are using a camera able to videotape it and send the information to your computer.
What kind of software a client and you could use to broadcast the video? The easy answer is Skype, but is there something broader than that?
OS: Windows or Linux, doesn't matter
More than 100 clients/people
No price limit
Client connecting to broadcast simultaneously: additional feature would be a plus
Special feature of the software: appart from its basic broadcasting feature, any
Typical use: Imagine I wanted to broadcast a TED talk to my school. I'd be there with my video camera (for instance Canon C100 or Canon VIXIA) and from that video camera to the "sofware I'm asking about" so that students would connect to the client part of that "sofware" so watch the event.