Credit: ccarlstead CC-BY 2.0. Playing cards developed their four-suit design in the 1480s in France. By the late 1800s, factories mass-produced standard English playing cards that featured diamonds, hearts, clubs and spades, a design that prevails as of September 2014. Older cards were based on Latin suits of cups, swords, coins and rods.
Definition - What does Spread Spectrum mean? Spread spectrum is a technique used for transmitting radio or telecommunications signals. The term refers to the practice of spreading the transmitted signal to occupy the frequency spectrum available for transmission.
Related Terms. 1  electromagnetic spectrum. 2  RFID printer. 3  RF-radio frequency. 4  FHSS-frequency-hopping spread spectrum. 5  passive tag. 6  Home RF. 7  DSSS-direct-sequence spread spectrum. 8  RF tag. 9  geo-fence. 10  identification.