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The Number 1933: Properties and Meanings1933 is a Prime Number.
1933 is a Centered Heptagonal Number.
The Year 1933 ADIn the year 1933 AD Frequency modulation (FM radio) invented by Edwin Howard Armstrong.
In the year 1933 AD Stereo records were invented.
In the year 1933 AD Richard M. Hollingshead builds a prototype drive-in movie theater in his driveway.
In the year 1933 AD Annie Besant, author and noted Theosophist died.(Esoteric History)
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