Cub'X-Window v5.0 is a true X11R6 client/server solution for the NEXTSTEP operating system running on NeXT, Intel, HP PA-RISC and Sun SPARCstations. Cub'X-Window for NEXTSTEP is no longer a supported software product. As of 01/01/2001 we still have some Cub'X-Window inventory. If you are interested in receiving a free copy of the Cub'X-Window 5.0 CD and user manual, please send a self-adressed bubble padded envelope of about 8x10 inches stamped at $3.50 to: VMGEAR attn: Cub'X-Window 21020 Homestead Rd Ste 3 Cupertino, CA 95014 You will receive a CD and user guide by return of mail. If you are looking for a serial number to unlock a copy of Cub'X-Window 5.0 you can use the following: Serial number: 9778205 License: BR4N9SeENY We no longer provide license numbers for Cub'X-Window v 4.x or lower. You can e-mail us at cubx@vmgear.com