The operating system is generally consisting of shell and kernal / core. RTK mainly refers to the kernel, directly involved in hardware operations, and as for the high-end RTOS, many manufacturers can't afford to buy VxWorks, PSOS The product
The mobile phones we use now are all manufacturers buy drawings from abroad, and then develop by their own national conditions, such systems require strong C language and assembly language knowledge. That is to use C to do a support software for hardware low-level, which belongs to the comparative real-time operating system, and many series of NOIKA are in Symbian. This system is developed with C . There is also a mobile phone supported by the MS system, as well as MOTO has now made a Linux operating system. This classification is embedded. And J2ME Don't confuse, J2ME indicates the application of the mobile phone. If you use a PC, Windows is an operating system. The Office is the application software. The J2ME application is software vendors and service providers to do software based on different mobile phones, this software is better than the type of software in the PC. C can also be developed by mobile phone applications, but still to get the released SDK.
