Coverage Statements: Dental services provided for the routine care, treatment, or replacement of teeth or structures (e.g., root canals, fillings, crowns, bridges, dental prophylaxis, fluoride treatment, and extensive dental restoration) or structures directly supporting the teeth are generally excluded from coverage under Aetna's medical plans, ...
A hard disk drive (sometimes abbreviated as Hard drive, HD, or HDD) is a non-volatile memory hardware device that permanently stores and retrieves data on a computer. A hard drive is a secondary storage device that consists of one or more platters to which data is written using a magnetic head, all inside of an air-sealed casing.
Confidence votes 17. Yes, a hard drive is more properly called a hard disk drive. They are not the same thing, but a hard disk drive is a type of disk drive, just like a floppy disk drive is another type, and just like a soft armor and hard armor are both types of armor.You can pretty much use disk drive and drive interchangeably in computer contexts.ou don't SEE the disk(s), because they're locked inside, and so you could easily wonder if it's actually a disk drive. Some people use hard drive and hard disk interchangeably, probably because they're not really sure what the difference is.