Final answer:
Telecommunication companies and emergency services enable the general public to make a 911 call through virtually any communications device.
Step-by-step explanation:
The ability for the general public to make a 911 call through virtually any communications device is made possible by telecommunication companies and emergency services. Telecommunication companies provide the infrastructure and technology for connecting phone calls, whether through traditional wired networks or wireless technologies like satellite communication. Meanwhile, emergency services, such as police, fire, and medical services, are responsible for receiving and responding to 911 calls.