C-mount security cameras (or cs mount security cameras, as they are sometimes called) were the first security cameras and defined the industry. In 1970’s and 1980’s, c-mount security camera were invented, but they were simply known as security cameras because cs-mount cameras were the single style available. The iconic boxy cs-mount type was necessary because in the 70’s the circuit boards and other internal items in cameras were still very large. As technology has improved over time, security cameras were able to get much smaller and the bullet camera style has begun to define the idea of a security camera.