July 19 (Reuters) - A global tech outage was disrupting operations across multiple industries on Friday, with airlines halting flights, some broadcasters off air and services from banking to healthcare hit by system problems. While major U.S. airlines - American Airlines (AAL.O), opens new tab, Delta Airlines (DAL.N), opens new tab and United Airlines (UAL.O), opens new tab - grounded flights, other carriers and airports around the world reported delays and disruptions early on Friday. Banks and financial services firms from Australia to India and Germany warned customers of disruptions. In Britain, booking systems used by doctors were offline, multiple...