Bitcoin Values: 
Block     25
Bitcoin   1
Bitcent   0.01
Bit        0.000001
Satoshi   0.00000001

	Data sizes
1 Byte = 8 Bits
Kilobyte = 10^3 = 1000 bytes = 8000 bits
Megabyte = 10^6 = 1000000 bytes = 8000000 bits
Kibibyte = 2^10 = 1024 bytes = 8192 bits
Mebibyte = 2^20 =  1048576 bytes = 8388608 bits

	Frequencies:
1G -  850MHz-1900MHz
2G/3G - 2100MHz
4G LTE - 600MHz, 700MHz, 1.7/2.1GHz, 2.3GHz, and 2.5GHz
5G - 28GHz, 39GHz
Wifi - 2.4GHz, 5GHz
Wigig - 60GHz
Infrared -  300GHz-430THz
Ultraviolet - 750THz-30PHz
Low Frequency RFID - 125KHz-134.2KHz
High Frequency RFID - 13.56MHz
Ultra High Frequency RFID - 433MHz(active) and 860–960MHz(passive, country based)
ZigBee - 2.4GHz(most devices) 784 MHz(rare China), 868 MHz(rare Europe), 915 MHz(rare US and Australia)
Z-wave - 900MHz
Digital cordless phones - 900MHz, 1.9GHz, 2.4GHz, 5.8GHz
TV channels - 40 to 820 MHz
Longwave AM Radio - 148.5KHz–283.5KHz
Mediumwave AM Radio - 525KHz–1710KHz
Shortwave AM Radio - 3MHz–30MHz
Radio controls -  27MHz, 49MHz, 72MHz, 2.4GHZ