RMS is an API where the program can store application data locally within the device. MIDP Record Management System is a facility owned by MIDlets to store data when the MIDlet application invocations. Data will be stored in non-volatile memory within the device. This means, the data that has been stored programs will not be lost even on restarting the program or device is turned off.
RMS Tutorial on the Java Micro Edition with Rs.java class
1. Create a Mobile Application in Netbeans project your
2. Give the name Example Rs, remove the check in the Create Hello Midlet then Finish
3. Create a packages with names example
4. Create a class in the package example with names Main that is extends by MIDlet
Your application in code igniter is a PHP-Site.You can use Code Igniter to create multiple application using one core. You can create subdomain for each application (not only one domain).
But still in one model for one application. so the application has their own model. and the model can’t be used by other application. :p
Imagine if you has multiple application with the same feature and same database and the application is connected(integrated). so you create a model using copy paste? maybe it can be a problem if you forgot to copy paste.
How to use multiple application using one core and one model? so the application you has created just using one model. and you just create and edit one file. 
interesting.
