Here is a list of all namespaces with brief descriptions:

Mdc_args	Command line arguments parser
Mdc_calendar	Calendar and date module
Mdc_calendar_generic	Interface declarations for dc_calendar procedures
Mdc_calendar_internal	Internal module for dc_calendar
Mdc_calendar_types	Derived types and parameters of calendar and date
Mdc_clock	Monitor of CPU TIME
Mdc_date	Date and time manipulation module
Mdc_date_generic	Interface declarations for procedures provided from dc_date
Mdc_date_internal	Internal module for dc_date
Mdc_date_types	Derived types and parameters for date and time
Mdc_error	Error handling module
Mdc_hash	Hash (associative array) module
Mdc_iounit	Unit number handling at file open
Mdc_message	Message output module
Mdc_present	Judge optional control parameters
Mdc_regex	Provides simple regular expression subroutine: 'match'
Mdc_scaledsec	Scaled seconds module for precise time operations
Mdc_string	Handling character types
Mdc_test	Support making test programs
Mdc_trace	Debug tracing module
Mdc_types	Provides kind type parameter values
Mdc_units	Unit system processing module
Mdc_url	Variable URL string parser
Mdc_utils	User interface of dc_utils
Mdcunits_com	Internal module for dc_units
Mgt4_history
Mgt4f90io
Mgtdata_generic
Mgtdata_internal_map
Mgtdata_internal_vartable
Mgtdata_netcdf_file_generic
Mgtdata_netcdf_file_internal
Mgtdata_netcdf_file_types
Mgtdata_netcdf_generic
Mgtdata_netcdf_internal
Mgtdata_netcdf_types
Mgtdata_types
Mgtool5
Mgtool_history
Mgtool_history_generic
Mgtool_history_internal
Mgtool_history_nmlinfo
Mgtool_history_nmlinfo_generic
Mgtool_history_nmlinfo_internal
Mgtool_history_nmlinfo_types
Mgtool_history_types
Mgtool_historyauto
Mgtool_historyauto_generic
Mgtool_historyauto_internal
Msysdep	Provides interface for system dependent procedures