MEANING OF MS-DOS-
MS-DOS is an operating system designed for the IBM PC by Microsoft in 1981. MS DOS is Microsoft Disk Operating System. It was a command-line interface, meaning the user had to type in commands to use it, unlike Windows which is a Graphical User Interface. MS DOS was released on IBM PCs when they came out in the 1980s and continued in popular use until the mid 1990s, by which time the first of the Windows operating systems, Windows 95, began to take over.
In the personal computer operating systems MS-DOS and PC DOS, a number of standard system commands were provided for common tasks such as listing files on a disk or moving files. Some commands were built-in to the command interpreter; others existed as external commands on disk. Over the several generations of DOS, commands were added for the additional functions of the operating system. In the current Microsoft Windows operating system a text-mode command prompt window can still be used. A command can be given in Capitals or Small letters also. C :\> is known as DOS/command prompt, where we give the commands.
TYPES OF DOS COMMANDS-
DOS commands are of two types- Internal and External.
These commands do not require any special files for being executed and are brought into the computer's memory as soon as the computer is switched on. For example- COPY, DEL, DIR, TYPE, CD, MD, CLS, DATE, TIME.
Features of Internal Commands-
1. These are those functions that are built into the command interpreter.
2. There is no need of any external file in computer to read internal MS-DOS command.
3. These commands can be used as long as DOS is running on the system.
MS-DOS command that is not included in command.com is called External DOS Commands. External commands are commonly external either because they require large requirements or are not commonly used commands. For example- Tree, format, restore, etc.
Features of... [continues]
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