Remember BlackBerry? It ruled the infant smartphone market; now it accounts for less than 1% of global sales. But BlackBerry is not dead yet. Under John Chen, chief executive for the past year, it is concentrating on its old strengths: business users and security. Today in San Francisco the Canadian company is holding an event for corporate customers; it may show off a new version of its secure communications server, as well as video-conferencing via BBM, its instant-message system. Mr Chen can boast one tech turnaround already, of Sybase, a database-software company. On his watch BlackBerry’s share price has roughly doubled (though it had collapsed before that). It jumped on Monday when Mr Chen said he had talked to Chinese smartphone-makers about possible partnerships, and again yesterday, ahead of today’s event. Losses are at least narrowing. But investors—to whom the firm is also talking today—will want to know when those will turn to profits.