Human: What are some of the most popular types of home security systems? Assistant: 
Some of the most popular types of home security systems include wired systems, wireless systems, hardwired systems, and DIY systems. Wired systems typically require professional installation and are generally more expensive than other options. Wireless systems offer a cheaper option but may not be as reliable or secure as wired systems. Hardwired systems are installed by professionals and can provide greater protection from intruders. DIY systems are often less expensive than professionally-installed systems but still offer strong protection.