HD Scientific & Educational Abbreviation

Huntington'S Disease

Huntington's disease (HD), also known as Huntington's chorea, is an inherited disorder that results in death of brain cells. The earliest symptoms are often subtle problems with mood or mental abilities. A general lack of coordination and an unsteady gait often follow. As the disease advances, uncoordinated, jerky body movements become more apparent.

Hold

Coil type indicating that a produced coil or lift has problems that need to be resolved by the Quality Assurance department. A method of stopping the normal disposition of a record, usually because of court cases or investigations. 2.An order status that prevents certain modification types and transactions from processing the order or order line until the hold is released.

Head-Up Display

A cockpit system where data from flight instruments is projected onto a screen or the wind-screen so that the pilot can see it with-out having to look down.

Hilary Duff

huntington disease

High Desert

Distilled Mustard (blister agent)

Heavy Density

Hard Drive

The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are physically located. A typical hard drive is only slightly larger than your hand, yet can hold over 100 GB of data. The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin extremely fast (typically at either 5400 or 7200 RPM) so that data can be accessed immediately from anywhere on the drive.