 FreeBSD is developed by a volunteer team located around the world . The developers use the Internet for all communication and many have not met each other in person . In addition to local user groups sponsored and attended by users , an annual conference , called BSDcon , is held by USENIX . BSDcon is not FreeBSD @-@ specific so it deals with the technical aspects of all BSD operating systems , including OpenBSD and NetBSD . In addition to BSDcon , three other annual conferences , EuroBSDCon , AsiaBSDCon and BSDCan take place in Europe , Japan and Canada respectively . 
