A job description's primary purpose is employee recruitment. The job description alerts potential employees to the job opening and the job's requirements. As a result, the job description meets the company's need to attract qualified employees as defined by the job summary and job functions specified in the description.
dr martin cooper is the person credited with both inventing the modern cell phone as well as making the first cell phone call in new york city new york in april 1973 a related invention is the cave radio phone invented by nathan stubblefield who was awarded a patent for the idea in the early 20 th century 1908
The first mobile phones used analog technology. This is pretty much how baked-bean can telephones work too. When you talk on a baked-bean can phone, your voice makes the string vibrate up and down (so fast that you can't see it). The vibrations go up and down like your voice.