a day like today, but for 35 years, pedestrians walking in front of the Bell building in New York, were witnesses to a unique spectacle: Martin Cooper, an engineer at Motorola, calling Yoel Engel-competitive research, the laboratories of AT & T Bell to tell him to come out to see out the window. There had been nothing unusual, if not because he was in the street, but did not use a public phone: this day in 1973, Cooper performed the first cellphone call in history. Motorola Bell had won the race of creation mobile phone, and its creation marked an engineer serving two main objectives: to communicate and show off. While the final invention is attributed to Cooper, the technology that gives life to the cellular system had been developing since late 1947. So researchers at Bell Laboratories proposed using hexagonal cell towers for mobile phones, after a long look at the first mobile radio frequency. In the following decades, while the radio communication became popular for military and civilian, also advanced mobile technology. Cellular networks first appeared, but were closed systems (no one could call a telephone line for example), the call was cut when she went from one to another transmission tower and equipment weighing up to 40 kg, among other limitations. In the '70s, thanks to the development of digital technology and created the first cellular networks in Japan and the United States. And as recently as the '80s began to market with the Motorola DynaTAC 8000x, the same as used Cooper. In addition to unsightly, weighed 800 grams and was charged for ten hours to speak only once. The price? just $ 4,000 in 1983. Nevertheless, it was a success, although a few, at least initially. Since then, device manufacturers proliferated, phone company, and Yet many technology. The service went from analogue to digital networks in 90, and now the 3G. The development also narrowed sizes and to reduce costs to popularize. In 1990, when the first born digital and GSM networks, there were 11 million phones in the world, one in 500 people. "Our dream was that someday nobody would talk from a phone connected. All talk by mobile phones," said Cooper Reuters last week. At 79 years, completed half of his dream: Today there are 3 million 200 thousand phones, one every two people, and Argentina is on track to have more than one inhabitant. Few imagine daily life without one. El avance fue también tecnológico: el invento que Cooper concibió sólo para llamadas de voz, ahora combina funciones de la computadora, reproductores de mp3, cámaras de foto y video, y una lista larga de etcéteras. Hoy, el futuro de toda tecnología está en un celular.
