To calculate your 2-D position (latitude and longitude) and track movement, a GPS receiver must be locked on to the signal of at least 3 satellites. With 4 or more satellites in view, the receiver can determine your 3-D position (latitude, longitude and altitude). Generally, a GPS receiver will track 8 or more satellites, but that depends on the time of day and where you are on the earth. Some devices can do all of that from your wrist.
The first smartphone was developed by IBM and BellSouth, which came out to the public in 1993. Althought basic compared to todayâs standards âSimonâ had a touch screen that was capable of accessing email and sending faxes. Smartphones are major extensions on normal cellphones.
The telephone was invented on the 10th March 1876. The telephone was invented by Alexander Graham Bell, a Scottish inventor, scientist and engineer. Alexander Graham Bell actually considered his invention of the telephone to be an intrusion of his scientific work and refused to have one installed in his study.ntonio Meucci invented an early voice communicating device around 1854, but was unable to patent his telettrofono due to lack of money. He installed a telephone-like device within his house in order to communicate with his wife who was ill at the time.