electroencephalography (EEG), electrocardiogram (ECG), pulse oximetry, airflow, and leg movements. Sleep stages are assigned by human experts based on visua...

https://www.apple.com/jp/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf

Apple_Supplier_Clean_Energy_Program_Update_2020 Supplier Clean Energy 2020 Program Update Apple is committed to addressing climate change and increasing the...

https://www.apple.com/jp/environment/pdf/Apple_Supplier_Clean_Energy_Program_Update_2020.pdf