Cell Phones
Many different people contributed to the creation of the mobile phone. Bell Laboratories introduced the idea of the first mobile car phone, in 1947. However, Dr. Cooper, from Motorola, was the first to incorporate the technology into a portable device, which he patented September 16, 1975. Throughout the 70's and early 80's, the mobile phone was not a popular communication device, due to the small number of radio frequencies available in any given area. Phone calls were also very limited, only a dozen or two calls could be made at the same time in an area. To solve this problem, many small areas (called cells), would share the same frequencies. In this new system of cells, a small number of radio frequencies could then accommodate a huge number of calls. This is how the mobile phone came to be called the "cellular phone". Cellular phones have changed in many ways since the first mobile phone. Several features have been added, replacing the need for other various items such as; computers, watches, day planners, address books, alarm clocks, and even cameras. Cell phones have become more than just a wireless communications device.