Telegraphs were used to communicate information from point A to point B. The invention of the telegraph opened doors and ideas to new forms of communication. Telegraphs are considered analog, where electrical signals were transmitted over wires. In electrical engineering, analog is described as continuous, whereas digital is discrete. Personally, I am more interested in the digital aspect of electrical engineering because it is more relevant in our society today. The downside of analog systems, such as telegraphs, is that because the signals are continuous, it is very hard to separate noise from the original signal. There are research areas in electrical engineering where engineers attempt to perform this separation.

In the past, analog systems were definitely used more often because they are, arguably, mathematically easier and were “founded” first. But as technology and the human brain advance, the world leans more towards the digital side.

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