|Floppy-disk drive||Mechanism to read and write to low-capacity, removable, magnetic disks. Used to store and easily transport information.|
|Hard-disk drive||High-capacity internal (and sometimes external) magnetic disks for storing data and program files. Also called fixed disks.|
|Modem||Converts computer data to information that can be transmitted over telephone wires and cable lines. Allows communication between computers over long and short distances.|
|Network card||An expansion card that allows several computers to connect to each other and share information and programs. Also called network interface card (NIC).|
|CD recorder||Also called CD/R. You can create a CD with this device, but you can only write to a section of the disc once. Variations on this type of device include CD-RW (CD Read/Write) drives. These products allow you to read, write, and overwrite a special CD-ROM-type disc.|
|Tape drive||Large-capacity, magnetic, data-storage devices. Ideal for backup and retrieval of large amounts of data. Works like a tape recorder and saves information in a linear format.|
The following points summarize the main elements of this lesson:
All computer hardware can be classified by primary function (input, processing, or output).
Some hardware devices combine multiple functions (input and output).
Some hardware devices, such as network and modem cards, expand the communication abilities of a computer.
Data-storage capabilities have been increased with the use of CD-ROM and CD/R.