It's the abbreviation for Mean Corpuscular Hemoglobin. This is a measure for how much hemoglobin per red blood cell count. MCH stands for Mean Corpuscular Hemoglobin. It is a measure of the average amount of hemoglobin in each red blood cell. 9 people found this useful.
Human Interface Device (HID) Definition - What does Human Interface Device (HID) mean? A human interface device (HID) is a method by which a human interacts with an electronic information system either by inputting data or providing output. A myriad of HID devices exist. The most common are the keyboards, mice, computer speakers, webcams and headsets.
Likewise, the PS/2 standard does not support the HID protocol. The USB human interface device class describes a USB HID. Components of the HID protocol. In the HID protocol, there are 2 entities: the host and the device. The device is the entity that directly interacts with a human, such as a keyboard or mouse.