International organisations urged the business sector yesterday to make the HIV/Aids epidemic one of the ``bottom line issues'' at the workplace. A one-day study programme, entitled ``Thailand CEO study mission on HIV/Aids'', was organised by Thailand Business Coalition on Aids (TBCA) to brief top management people about the HIV/Aids epidemic's impact on businesses and their employees. It was attended by more than 25 CEOs and senior managers of leading firms in Thailand including Unocal, Nike, Siam Commercial Bank, Thai Airways International and the Tourism Authority of Thailand.