Here are the data structures with brief descriptions:

Cws_eeprom_handle_t
Cws_rtc_date_t
Cws_rtc_datetime_t
Cws_rtc_time_t
Cws_screen_cell_t
Cws_sound_wave_t
Cws_sound_wavetable_t
Cws_sprite_t
Cws_tile_4bpp_t
Cws_tile_t