I appreciate the quick response. I am still a little confused. I guess its coming from a blackberry. When i would install an application on my bb-- i could go to my memory and see where that application had taken away so many mb's. So I guess what the task manager is showing is ram that actually powers the phone?? And the space I have for installing new apps is the 748?? Sorry again but just trying to learn.
The 748mb is flash memory which acts like an sd memory card, it can be written to and read. The ram is what your phone uses for immediate tasks, such as running apps, multitasking and etc. The rom is where the firmware (bios) is stored.
So you have 3 (sorry i mean 4) different kinds of memory being used.
ROM = Read Only Memory (rarely ever written to, is read when the device first boots)
RAM = Random Access Memory (needed to run apps, tasks, etc)
Flash = Disk space where data can be read and written to as often as needed. This area is where the os is stored and also stores your app settings and etc.
SD Flash (Extrernal) = SD memory card, an external form of data storage. (Mostly used for media storage ie: photos, music, videos)
So you have it accessing the memory in this order:
1. Boot - ROM is read and tells the device how to power up and what to do next (load os, etc)
2. Startup - OS is loaded from the flash memory, this is where the operating environment comes to life.
3. Home Screen (SenseUI) Bootup - The home screen is booted and then starts loading apps into RAM for use.
4. Apps Startup - Apps are loaded into RAM so they are quickly accessable to the device when they are needed.
5. Application Runtime - The application is read from the internal Flash memory and then does what its suppose to.