Wat (wie) is IBM 3340 - definitie
![U.S. Army Red River Arsenal]], with two IBM 350 disk drives in the foreground](https://commons.wikimedia.org/wiki/Special:FilePath/BRL61-IBM 305 RAMAC.jpeg?width=200 "U.S. Army Red River Arsenal]], with two IBM 350 disk drives in the foreground")
![IBM 1311 disk drive with IBM 1316 removable disk pack at the [[Computer History Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/IBM 1311 disk drive at CHM.jpg?width=200 "IBM 1311 disk drive with IBM 1316 removable disk pack at the [[Computer History Museum]]")
![IBM 2314s at the University of Michigan. Note removable [[disk pack]]s and empty covers on top of the drives](https://commons.wikimedia.org/wiki/Special:FilePath/IBM 2314 DiskDrives and IBM 2540 CardReader Punch.jpg?width=200 "IBM 2314s at the University of Michigan. Note removable [[disk pack]]s and empty covers on top of the drives")
![RAMAC mechanism at [[Computer History Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/IBM 350 RAMAC.jpg?width=200 "RAMAC mechanism at [[Computer History Museum]]")
.jpg?width=200 "9335 drive")
![3278-2A terminal]]](https://commons.wikimedia.org/wiki/Special:FilePath/MNACTEC keyboards (30316690493).jpg?width=200 "3278-2A terminal]]")
![[[Vacuum tube]] logic module from a 700 series IBM computer](https://commons.wikimedia.org/wiki/Special:FilePath/IBM 700 logic module.jpg?width=200 "[[Vacuum tube]] logic module from a 700 series IBM computer")
.jpg?width=200 "IBM 7010 system: console (in front), disc drives and processing modules (left), tape storage, punch card reader and printer (right)")
.jpg?width=200 "IBM 7074")
![Transistorized [[IBM Standard Modular System]] (SMS) card used in the 7000 series](https://commons.wikimedia.org/wiki/Special:FilePath/SMScard.jpg?width=200 "Transistorized [[IBM Standard Modular System]] (SMS) card used in the 7000 series")
Wikipedia
IBM manufactured magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. Both the hard disk drive (HDD) and floppy disk drive (FDD) were invented by IBM and as such IBM's employees were responsible for many of the innovations in these products and their technologies. The basic mechanical arrangement of hard disk drives has not changed since the IBM 1301. Disk drive performance and characteristics are measured by the same standards now as they were in the 1950s. Few products in history have enjoyed such spectacular declines in cost and physical size along with equally dramatic improvements in capacity and performance.
IBM manufactured 8-inch floppy disk drives from 1969 until the mid-1980s, but did not become a significant manufacturer of smaller-sized, 5.25- or 3.5-inch floppy disk drives (the dimension refers to the diameter of the floppy disk, not the size of the drive). IBM always offered its magnetic disk drives for sale but did not offer them with original equipment manufacturer (OEM) terms until 1981. By 1996, IBM had stopped making hard disk drives unique to its systems and was offering all its HDDs as an original equipment manufacturer (OEM).
IBM uses many terms to describe its various magnetic disk drives, such as direct-access storage device (DASD), disk file and diskette file. Here, the current industry standard terms, hard disk drive (HDD) and floppy disk drive (FDD), are used.
