Explain DOS (PC T1 Q2)

• 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. 
• MS DOS commands were either stored as individual programs, known as external commands, or in a file called Command.com, which stored more commonly used commands. 
• These were called internal commands. Included in these would have been commands like COPY, DEL, DIR, CD and RD.

1. COPY enabled the copying of files.
2. DEL deleted files.
3. DIR gave a listing of files in a directory (now called a folder).
4. CD changed from one directory to another.
5. RD removed a directory.