learning better storytelling techniques, learning how to effectively use humor as a communication tool, and continuously researching in their topic area of focus. Professional speakers Public speaking for business and commercial events is often done by professionals, whose expertise is well established. These speakers can be contracted independently, through representation by a speakers bureau, or by other means. Public speaking plays a large role in the professional world. In fact, it is believed that 70 percent of all jobs involve some form of public speaking. Modern Technology New technology has also opened different forms of public speaking that are non-traditional such as TED Talks, which are conferences that are broadcast globally. This form of public speaking has created a wider audience base because public speaking can now reach both physical and virtual audiences. These audiences can be watching from all around the world. YouTube is another platform that allows public speaking to reach a larger audience. On YouTube, people can post videos of themselves. Audiences are able to watch these videos for all types of purposes. Multimedia presentations can contain different video clips, sound effects, animation, laser pointers, remote control clickers, and endless bullet points. All adding to the presentation and evolving our traditional views of public speaking. Public speakers may use audience response systems. For large assemblies, the speaker will usually speak with the aid of a public address system or microphone and loudspeaker. These new forms of public speaking, which can be considered non-traditional, have opened up debates about whether these forms of public speaking are actually public speaking. Many people consider YouTube broadcasting to not be a true form of public speaking because there is not a real and physical audience. Others argue that public speaking is about getting a group of people together in order to educate them further regardless of how or where the audience is located . Telecommunication Telecommunication and videoconferencing are also forms of public speaking. David M. Fetterman of Stanford University wrote in his 1997 article Videoconferencing over the Internet: "Videoconferencing technology allows geographically disparate parties to hear and see each other usually through satellite or telephone communication systems." This technology is helpful for large conference meetings and face-to-face communication between parties without demanding the inconvenience of travel. Notable modern theorists Harold Lasswell developed Lasswell's model of communication. There are five basic elements of public speaking that are described in this theory: