Assertion: stored program computer | /r/CapableOf | use ultrasonic waves
Facets:
value: in special electron tubes
type: LOCATION
value: in tubes of mercury or charges
type: LOCATION
value: in the late 1940s
type: TEMPORAL
value: as main memory
type: MANNER
Source sentences:
text: In the late 1940s the first stored-program computers used ultrasonic waves in tubes of mercury or charges in special electron tubes as main memory.