OFFICE HOME AND STUDENT 2007

if it has a multiple install option.

i had a copy of office student 2003 which let me install on 3 computers. check on the case and it will tell you if you have that option

btw, turn off your caps lock. caps lock = yelling
 
i never really checked (and thinking about it i probably should) but in my house, we have Office 07 installed on 3 computers... didnt have any issue, just inserted the disc, put in the key code and clicked next :)