what is mean by nRF, nRFX, and soft devices??

[ShubMane]

Please give me the brief information of above terms and what its means..

[ShubMane]

please update ASAP

[Kenneth]

I suggest to start with:
https://infocenter.nordicsemi.com/topic/struct_sdk/struct/sdk_nrf5_latest.html

The softdevice is a precompiled library from Nordic that provide for instance BLE support:
https://infocenter.nordicsemi.com/topic/struct_nrf52/struct/nrf52_softdevices.html

You can find a description of difference between nrf and nrfx drivers here:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/nrfx_migration_user_guide.html