the invetion of cell phone (by Julieta Kaplan)

By 1973, Martin Cooper invented the first cell phone. at the beginning were very large and expensive, and were only used by the military and some businesses. For 1983 were smaller and economic and could be used by the general public. The revolution of the cell was in 2001 when it began to appear phones with color display. and in 2006, when cellular appeared with cameras. at present has become an object used by all people.