/**

@defgroup internal_api Internal and System API
@brief Internal and System API
@{

@}

@defgroup os_services Operating System Services
@brief Operating System Services
@{

@brief MCUmgr
@defgroup mcumgr MCUmgr
@{
@}

@}

@brief Device Driver APIs
@defgroup io_interfaces Device Driver APIs
@{
@}

@brief Miscellaneous Drivers APIs
@defgroup misc_interfaces Miscellaneous Drivers APIs
@ingroup io_interfaces
@{
@}

@brief Multi Function Device Drivers APIs
@defgroup mfd_interfaces Multi Function Device Drivers APIs
@ingroup io_interfaces
@{
@}

@brief Testing
@defgroup testing Testing
@{
@}

@brief Connectivity
@defgroup connectivity Connectivity
@{
@}

@brief USB
@defgroup usb USB
@ingroup connectivity
@{
@}

@brief Utilities
@defgroup utilities Utilities
@{

@brief Data Structure APIs
@defgroup datastructure_apis Data Structure APIs
@{
@}

@}

@brief APIs to interact with third-party services or applications
@defgroup third_party Third-party
@{
@}

@brief Modem APIs
@defgroup modem Modem APIs
@since 3.5
@version 0.1.0
@{
@}

*/