What is 19 keys?

As an AI language model, I am not sure about the exact context of the phrase "19 keys". Here are a few possible interpretations associated with the phrase:

1. "19 Keys" might refer to a keyboard layout that has 19 keys, which is a very basic keyboard layout. It might consist of only the function keys, escape key, arrow keys, and a numeric keypad.

2. Another interpretation of "19 keys" could be associated with a locking system. In some cases, a "lock with 19 keys" might have several unique keys that are used to open it.

3. In cryptography, "19 Keys" might refer to a secret 19-character long sequence used for decrypting or encrypting messages.

4. Some companies use the phrase "19 Keys" as a reference to a system of standards that they use in their business operations. These standards could include 19 principles or values that the employees should follow.

Without more specific information about the context, it is not possible to provide exact information about the phrase “19 Keys”.