Brian McIntosh
Camera The great invention that made it possible to immortalize unforgettable moments is hidden under the spotlights of mobile phones that have been the substitute for these devices that seem to be used only by people over 65 years old. Despite this, cameras are still a very useful tool in very specific areas. Spies have created tiny cameras in pens or glasses, although not everything was so fanciful. The first digital camera in history was developed by Kodak and invented by Steve Sasson on December 12, 1975. This camera was the size of a toaster and had a quality equivalent to 0.01 Megapixels. A trifle compared to today's mobiles.
Brian McIntosh
Pager The predecessor of the pager is a device created in 1921 at the request of the Detroit Police Department, but it was only in 1949 when the first telephone "pager" was invented and patented by inventor Al Gross and its first equipment was used by the Jewish Hospital of New York. However, it was not until 10 years later that the communications regulator in the United States, FCC, approved its use for the public. The popularity of these devices came in the 90's, when the use of telephones began, which at first only offered voice service. The "beepers" were very popular because of their low cost compared to the others. This fashion of using pagers came to an end when mobile phone networks began to integrate their functions, and today they are used only in very limited work environments.
Brian McIntosh