Mikhail: Hi! It is possible to compile QT Opie enviroment for p900? If it is possible, I would be good to compile some Linux application for P900... Alfonso: While Symbian is an operating system capable of some decent multitasking and multithreading, it's not an Unix-style system. In the Symbian you can start some "EXE" programs (actually {.EXE} extension) and dynamically linkable libraries (actually {.DLL} and {.APP} and a number of other extensions). They are subject to a number of limitations, for example, allocable memory (heap) limit, stack space limit, etc, stricter than the most common Unix-style systems around. Also, "forking" and starting a new executable is very time-consuming in respect of Unix-style systems. And, final issue, you have to connect to Symbian firmware "servers" to get the most common services (sockets, reading the keyboard, etc). I think that OPIE would require a huge effort to be ported on the P900, and final performance will be very low due to Symbian constraints. Most of the work will be converting Unix-style methods (for example, "open a socket", "fork this process", etc) to Symbian conventions. Opie was born for Zaurus-style machines equipped with Linux. I am trying to set up a standard library for simplifying most common tasks (e.g., use standard C library plus a few graphical and user I/O) to develop onto a Linux box and the recompile for P900. -- alf