Drive Name

A complete drive name consists of a drive letter and a colon. When using a command, you may need to type a drive name before your filename to tell MS-DOS where to find the disk that contains your file. For example, suppose you have a file named finances.doc on the disk in drive B. To tell MS-DOS where to find this file you would type the drive name before the filename:

b: finances.doc (b: - drive name, finances.doc - filename with extension)

Command

Just as you will run programmes to create and update files containing your data, you will also need to run some special programmes, called MS-DOS commands, that let you work with entire files. When you type MS-DOS commands, you are asking the computer to perform tasks. For example, when you use the diskcopy command to copy your MS-DOS master disk, you are using a file named diskcopy.exe, whose task is to copy the files on the MS-DOS disk.

Error messages

If you or your computer makes a mistake when using a device or MS-DOS command, MS-DOS displays an appropriate error message. Error messages apply to general errors (such as misspelling a command) or to device errors (such as trying to use a printer that is out of paper).

Memory

Memory is the place in your computer where information is actively used. When you run a programme, MS-DOS stores that programme and the files it uses in the computer's available memory. Some programmes and files use more memory than others, depending on how large and complex they are.

Devices

Whenever you use your computer, you supply the information (input) and expect a result (output). Your computer uses pieces of hardware called devices to receive input and send output. For example, when you type a command, your computer receives input from your keyboard and disk drive, and usually sends output to your screen. It can also receive input from a mouse, or send output to a printer. Some devices, such as disk drives, perform both input and output.

Device Names

Device names are special names given to each device that your computer "knows" about. An example of a device name is LPT1, which stands for the first parallel lineprinter connected to your computer. When you add a new device, such as a mouse, to your computer, you sometimes need to tell MS-DOS about it by setting up (configuring) your computer for that device.

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