and asynchronous medias to avoid issues resulted from dispersed workplaces. The skill of time and self-management of team members are also emphasized to overcome this challenge. Trust-related challenges Trust between members of virtual teams affects the quality and amount of shared information. When virtual teams meet face-to-face, it creates trust and cohesion and ensures knowledge sharing. Knowledge sharing in virtual teams influences the formation of trust and contributes to the effectiveness of the team. In written communication one cannot be sure about other members’ commitment and it is difficult to recognize others’ emotions. Time-related challenges If a virtual project is only a small part of the team members' job, members may not have enough time for the virtual project. Thus, for example, they have to process information fast. A particular challenge in virtual teams is following-through and responding at a right time because not responding could be interpreted as a lack of competence or commitment. Other than these knowledge and skills, it’s crucial for team members to be motivated to face these challenges. Certain experiences and characteristics of team members would also show significant effect. Applications Researchers and developers find more and more areas that could benefit from not only traditional media technologies but also emerging media technologies such as Virtual Reality. The first system focused on military, industrial and medical application, but stretched out on commercial use and entertainment soon after. Military Applications Virtual collaboration proves useful in a military setting. The military application supports essential environments including design, assembly, and maintenance, and overcomes a constraint of the geographic distance of many militaries and related enterprises or partners. Thus, virtual collaboration has become indispensable for conducting a daily operation. With the technologies, the integration of fully distributed teamwork enables individuals at different workstations in the same site and those in various places to work together. For instance, military applications augment navigational support, communications enhancement, repair, and maintenance through intrasite and intersite collaborative analyses, as well as allowing the regional expertise developed at each site to be applied wherever necessary across the boundary. Medical Applications Virtual collaboration is used for physician and nurses, or these hospital members and their patients, to be connected even when they are apart so that they can share valuable information. For instance, Web 2.0 applications, particularly wikis, blogs, and podcasts, have been widely used by many online health-related professional. Because it is easy to use