The organisers of this year's Intellect ICT Charity Ball are looking for four more companies to join Xerox, EDS, Cable & Wireless and Symantec as sponsors of the event, which is supported by Computer Weekly and the Information Technologists Company.
The theme of this year's ball, which takes place on Thursday 5 July, is "A Night in Las Vegas".
The event, compered by Jeremy Beadle, will raise money for Ace Centres, a charity that helps disabled people with complex physical and communication difficulties, working with technology such as that used by scientist Stephen Hawking to communicate.
Ace is currently helping to push the boundaries in eye-gaze-controlled technology for people with severe disabilities.
Last year, the ICT Charity Ball raised more than £50,000 for two charities: YouthNet, which helps disadvantaged children, and the WCIT charity, which supports the effective use of IT in charitable and community projects.
The ball is open to professionals from across the IT industry, whether users, suppliers or consultants.