serial board and tape backup help

[Rahman A. Soomro]

Dear Xenix friends,

I have PS/2 80, with sco 2.3.2 on want to add 
terminals to it. Right now it does not have any terminal
on it. I mean additional terminal.

what company/kind serial board should I look for, and where
to get that from.

What kind of teminal would be good buy; 

I also want to add tape backup unit. Please help me.

thanks.
rahman.