Everyone is talking about it. By it, I mean Voice over Internet Protocol (VoIP)—a popular, cheap, and effective way to provide telephony to businesses. But you probably didn’t know that VoIP has been around since 1974, did you?

The very first type of VoIP call was known as Network Voice Protocol (NVP) and was made in August of 1974. From there it was turned into the technology we know and use today by a company called Vocaltec in 1995, and in 1998 the first PC to Phone calls began.