
Wednesday, June 17, 2009
Hieroglyphic Language

FAX machine

Telegraph to telephone

In 1870's Alexander Graham Bell and Elisha Gray both independently invented a device that could transmit speech electrically. Thier designs were similar. Both rushed thier designs to the patent office. Alexander Graham Bell patent his telephone first. Both inventors had a huge legal battle over invention of telephone, which Bell won. So Alexander Graham Bell is considered the inventor of the phone. Before the invention of the telephone, telegraph was a major medium of communication. The Telegraph was establushed mean of communication for past 30 years. It was a revolutionary invention. It took communication to a whole new level. It opened up a new window for communication and technology. The telegraph and telephone are both wire-based electrical communication system and Bell invented telephone in attempts to improve telegraph. The telephone was better than telegraph mainly because voice transfer with electricity. The telephone was a revolutionary invention in communication technology.
Typewriter

CB Radio
Here is a link of a short video, that shows how CB radio works.
http://www.youtube.com/watch?v=NIPZgGQcCXQ&feature=fvw
Use Of A Telegraph

http://www.telegraph-history.org/
Monday, June 15, 2009
Tuesday, June 9, 2009
Beginning of Communication

Pigeons were used as convey massages in early days. They were called pigeon messengers. Pigeons were trained to deliver the parcel or note to particular places.
These pigeons are specially breded. They have trained to learn their way home over a long distance. Notes or parcel were tied to pigeon's legs or sometimes put in their mouths. First time this pigeon messengers were used in 776 BC. This technique was excessively used in World War I.
Here is a video that shows use of pigeon messengers in World War I.
http://www.youtube.com/watch?v=VO7VTERTn1M&feature=related