Providing of online forums for transmission of messages among computer users in the field of computer-aided design, in particular for cad users, cad software developers, cad software wholesalers and cad software retailers; providing internet chatrooms and internet forums, the aforesaid services being in particular for cad users, cad software developers, cad software wholesalers and cad software retailers; providing on-line forums for transmission of messages among computer users, the aforesai...