What is the ruling of buying and
selling American products, such as Hi-Tech ones like IBM, DELL and Microsoft.

Praise be to Allaah.

There is no reason why one should not buy American
products, like any other products which come to the Muslim countries from the kaafir
countries, or deal with the kuffaar for trading purposes, so long as this does not involve
anything that goes against sharee’ah; so long as there is no similar product
available from Muslim countries which would rule out the need for the kaafirs’
products; and so long as buying their products will not give them more strength against
the Muslims. And Allaah knows best.