The current version is designed primarily for use in embedded devices.
These editions are licensed exclusively for the development of embedded devices.
This is a side effect of the requirements for small database sizes on the lower end embedded devices.
When available memory is limited, as on embedded devices, this space cost can be prohibitive.
This is becoming more common as pin pitches continue to reduce, particularly in embedded devices.
There are hundreds, thousands of embedded devices these days that can only be accessed via the web.
Because of this it can be useful in embedded or mobile devices.
It can also be installed on most embedded devices.
It is a real-time operating system intended for embedded devices.
Only embedded devices will not be able to be upgraded.