MS-DOS (Microsoft Disk Operating System)
MS-DOS stands for Microsoft Disk Operating System. It has three essential files and many command files. These essential files are: IO.SYS (Input Output System), MSDOS.SYS (Microsoft Disk Operating System), and COMMAND.COM. These files are called system files of MS-DOS
Advantages/ Features of MS-DOS
- It supports various computer languages.
- It supports different disk like floppy, hard disk, CD etc.
- It is small sized operating system.
- It initiates the concept of operating system during the time of booting.
Disadvantages of MS-DOS
- It has a command line user interface so it is totally command based operating system.
- It has limited features to work with the modern computer system.
- It is not so user-friendly like windows system and cannot support advance computer peripheral devices even mouse.
- It is a single user, single tasking operating system.
Some terms used in DOS
Booting: The process of loading system files into computer's memory from disk is called booting. It starts when the computer is turned on. It makes computer ready to work. In the booting process, the command interpreter and system files are loaded into computer's memory. There are two types of booting: cold booting and warm booting.
- Cold Booting: Booting process from off stage to on stage of the computer is performed by the switch on the computer.
- Warm Booting: Booting process during the time of running the computer system is warm booting. We have to perform this process when the computer hangs up. We can perform it by pressing the reset button or pressing Alt+Ctrl+Del (Hold down the Ctrl key and Alt key and press Del key).
File: The systematic collection of related data or information or program instructions is known as file. A unique name is given for each file to identify. Such unique name is known as a file name. A file name contains name and extension. The name helps to identify the file and extension helps to identify the type of file.
Directory: Directory is the location to store files and sub-directories. It contains information about files stored on the disk like name, size, last date of modification, time of creation and disk volume label.
Instructions given to the computer to work are called commands. These are the common words between the computer and the user. It gives the orders to the computer system to work. DOS Commands are categorized into two types: Internal and External commands.
- Internal commands: Internal commands are built in the COMMAND.COM files. It can be executed from any DOS prompt because each of the internal commands are memory resident. As long as the computer is running, we are ready to give internal commands. Some of the examples of internal commands are DIR, CLS, COPY etc.
- External commands: Commands that need external additional files with command.com are external commands. We need additional corresponding files to run these commands. For example, we need tree.com file to run tree command. Example: XCOPY, CHKDSK, LABEL, TREE etc.
Things to remember
- The booting is a process of loading system files into working memory (RAM) to become ready to work. There are two types of booting: cold booting and warm booting
- The collection of data is called file.
- The file name has two parts: main part ( maximum 8 characters) and extension (maximum 3 characters).
- Internal command are built into the COMMAND.COM files.
- Commands that need external additional files with command.com are external commands. Example: XCOPY, CHKDSK, LABEL, TREE etc.
- It includes every relationship which established among the people.
- There can be more than one community in a society. Community smaller than society.
- It is a network of social relationships which cannot see or touched.
- common interests and common objectives are not necessary for society.
Videos for MS-DOS (Microsoft Disk Operating System)
MS DOS for beginners
Questions and Answers
Booting refers to starting up a computer. In other words, the process of loading the system files into the computer's memory is called booting.
Computer can boot in two different ways:
- Cold Boot
- Warm boot
MS-DOS is one of the most popularly used CUI operating system software for microcomputers which was developed by Microsoft Corporation USA
The features are:
- It is a single user operating system.
- MS-DOS can be run on both hard disk and floppy disk.
A file is a collection of related information stored on a disk with a unique name for its identification.
The rules for file naming are:
- The file name should not have more than eight characters.
- Blank spaces are not allowed while naming a file.
Internal commands are part of COMMAND. COM file of MS-DOS when a computer is started, such types of command are automatically loaded in computer's memory. Examples of internal commands are CLS, DIR, COPY, DEL REN, MD, CD, RD, etc.
External commands are not part of command.com. They have their own program file having extension as COM, BAT, EXE, etc.
Examples of external commands are LABEL, CHSKDSK, FORMAT, DELTREE, etc.