CU of digital clock counting the seconds going by.  CU of watch on wrist and finger dialing phone number. Demo of Popcorn, or time readout service. WS of two scientists working in front of an atomic clock from Hewlett Packard, HP which is accurate to one ninth billion of a second.  CU of a computer with its covering off. Reporter Richard Hart at the Exploratorium in San Francisco in front of a clock which is accurate to 1/1000 of a second. Demo of setting Mac computer clock to internet time.