base their talk around a visual presentation that displays key figures and research results. Size A large meeting will usually be called a conference, while a smaller is termed a workshop. They might be single track or multiple track, where the former has only one session at a time, while a multiple track meeting has several parallel sessions with speakers in separate rooms speaking at the same time. However, there are no commonly shared definitions even within disciplines for each event type. There might be no conceivable difference between a symposium, a congress or a conference. The larger the conference, the more likely it is that academic publishing houses may set up displays. Large conferences also may have a career and job search and interview activities. At some conferences, social or entertainment activities such as tours and receptions can be part of the program. Business meetings for learned societies or interest groups can also be part of the conference activities. Types Academic conferences typically fall into three categories: the themed conference, small conferences organized around a particular topic; the general conference, a conference with a wider focus, with sessions on a wide variety of topics. These conferences are often organized by regional, national, or international learned societies, and held annually or on some other regular basis. the professional conference, large conferences not limited to academics but with academically related issues. Infrastructure Increasing numbers of amplified conferences are being provided which exploit the potential of WiFi networks and mobile devices in order to enable remote participants to contribute to discussions and listen to ideas. Advanced technology for meeting with any yet unknown person in a conference is performed by active RFID that may indicate wilfully identified and relatively located upon approach via electronic tags. Organization Conferences are usually organized either by a scientific society or by a group of researchers with a common interest. Larger meetings may be handled on behalf of the scientific society by a Professional Conference Organiser or PCO. The meeting is announced by way of a Call For Papers (CFP) or a Call For Abstracts, which is sent to prospective presenters and explains how to submit their abstracts or papers. It describes the broad theme and lists the meeting's topics and formalities such as what kind of abstract (summary) or paper has to be submitted, to whom, and by what deadline. A CFP is usually distributed using