Sun also Netdisk, describing it as a standard way to connect a diskless workstation or personal computer to any server on the network in a multi-vendor environment. Netdisk is included in SunOS release 4.0 and in the ONC/NFS 4.0 Open Network Computing/Network File System software. Sun claims that over 25 computer and software vendors have committed to port Netdisk to their products. Sun says that hitherto, users generally had to deal with a dedicated server for each type of diskless system they bought. The new release also improves system throughout and has a new virtual memory management system. It will ship with all Sun systems from May.