Mexico telecoms czar Carlos Slim topped the Forbes annual world’s richest list, holding the edge over Microsoft’s Bill Gates who continued to give away billions to charity.

Research In Motion’s new leader said yesterday the Blackberry maker did not need seismic change, a declaration seized on by impatient investors who pledge Thorsten Heins will be an interim chief executive if he does not turn RIM around quickly.

BLACKBERRY maker Research in Motion (RIM) is taking on iPad in the table computer game with a “PlayBook” aimed to capitalise on its strength – the trust of business users keen on secure communications.