Heads up, public servants in Singapore — all your computers used for official business will be sent straight back to the dark ages, starting from May next year. That's right, no more Internet for you. A memo has been sent to all government agencies, ministries and statutory boards here, in a rare and surprising move to tighten security and stop potential leaks from work e-mails and shared documents. There are about 100,000 computers used for public service, and all of them will be affected by the change.