* Apple and Google are both pushing hard for HTML5 to replace proprietary plug-ins. Flash is famously absent from the iPhone and iPod touch, as well as the forthcoming iPad. Steve Jobs, Apple's chief executive, has allegedly criticised Flash for placing a strain on battery power, and is reported to have branded Adobe "lazy" for not working harder on making Flash Apple-compatible. Flash is estimated to be installed on 98 per cent of computers, and is crucial for viewing many online videos, games and graphics.