Spoiler
2:
4: Yo-yo
6: GI Joe?
8:
10:
3: Remote control
6: Ultra high frequency
9: Frequency modulation and amplitude modulation
12: Zenith
15:
4: Yo-yo
6: GI Joe?
8:
10:
3: Remote control
6: Ultra high frequency
9: Frequency modulation and amplitude modulation
12: Zenith
15: