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Originated by the U.S. Department of Defense, the Global Positioning System or the GPS is a tracking system that provides real time information on any location. This technology was presented to the use of the ordinary man only around the 1980s. GPS makes use of 24 to 32 medium earth satellites that can assist in recognizing the location. It comes with a receiver that picks up the signal sent from three or more satellites to plot the location using a technique called trilateration. The difference between the time at which the signal was sent from the satellite and the time at which it was received by the gadget pinpoints the position. Information related to the distance to destination, hiking and water maps and sunrise and sunset gets displayed on the GPS.

A study by Pink MP3 Players finds digital music players are just a current version of a long history of music players that the public have enjoyed over the past 150 years. Vinyl records was the start of this long history back in the 1800’s, this remained the format until the birth of 8 track tapes in the mid 1960’s. The 8 track tape reigned supreme until the smaller cassette tape was released and arose to fame in the mid 1970’s.