What's the point of having DVR, TiVo and Freevo?

There are several types of digital video recording devices, and three of the main one's are DVR, TiVo (which is a popular brand of DVR) and Freevo. They allow customers to record and store television shows in a fast, reliable and easily manageble way. It's extremely convinient for cable users, especially when they can't watch their favorite television shows live. These devices have internal hard drives that have memory capacities to store their recordings. It's hard to remember a time when these devices weren't avaliable, since so many people around the world use it today.