---

• n  one million periods per second

• With the new Haystack antenna that can project a narrow beam of 8,000-megacycle, 1.
• The walkie-talkie, which had not been allowed out in public before, got a ten-megacycle highway to stroll in.
• The beam of 2,450-megacycle microwaves starts out with three kilowatts of power; the diode antenna turns it into electricity with an efficiency of about 10% .

• megahertz
• MHz
• megacycle per second
• Mc