Ring
A ring may refer to any of the following:
1. In general, a ring may refer to any circular band that surrounds something or holds other objects. For example, a key ring that holds one or more keys.
2. With a network, a ring may be a short description of a Token Ring network, ring network, or ring topology.
3. With a phone, a ring may refer to the ringtone or noise the computer produces when someone calls the phone.
4. When describing a company, Ring makes and sells video doorbells and other security solutions for your home or office that's now part of Amazon.
5. In the category of wearable technology, there have been many companies that have developed or are working on smart rings. These digital devices can be worn on your finger to help control and interact with your computer and smartphone. Microsoft has patents for a smart ring that could replace your computer mouse and be used in VR (virtual reality) environments. The Smarty Ring was first proposed in 2013 to control and get alerts from your phone. Many NFC rings are also used to control other objects, such as unlocking a door with an NFC (near-field communication) reader.