[-YYZ-]

"In the late 50's, the frequency-hopping idea began to be used in military computer chips."

Highly unlikely, as the IC didn't exist until, what, the late 60's at the earliest? And anything that could be considered a computer chip didn't exist until the 70's.

[Ditto]

Highly unlikely, as the IC didn't exist until, what, the late 60's at the earliest?

Late 50s -- invented by a guy named Jack Kilby at Texas Instruments. In the early 60's they already had hand-held caculators on the market.