where can i download the unix system v

recently ,i want to give my friend a demo, and i want to use unix system v, but i don't know where get it.

i don't think that you will find a derivat called unix system V... in my opinion thats only a principle how your UNIX is built... there are three ways:
+ UNIX SYSTEM V (AT&T / USL )
+ BERKLEY's UNIX (like BSD)
+ Xenix (like SCO-XENIX)

you could "google" for derivats built on unix system v,
SOLARIS is build on US_V.r4 and has has also features of BSD and XENIX......

(correct me if i am wrong)

greetings Pre�y

really sorry , i'm a beginner and just get very little knowledge about unix,,
but i will continue to go to forword ,and really thank u to correct my fault.

Just to say that Berkely's unix would be extremely difficult for you maybe!
I dont know for the other two.

If you want a history lesson and geneology of the MANY variants of UNIX, take a peek at UNIX History

Cheers,

Keith