The first independent version of Microsoft windows version 1.0 released on 20 November 1985. It was named ” Interface Manager” later Rowland Hanson named Windows windows 1.0 was not a complete operating system, but rather an operating environment. The operating environment includes a simple windows paint, windows write a simple word processor calendar notepad clock control panel, Computer Terminal clipboard and RAM driver.
Microsoft windows version 2 came out on 9 December 1987 and proved slightly more popular than its predecessor. The popularity for windows 2.0 came by Microsoft new graphical applications Excel and word for windows. Microsoft windows gain a significant success with windows 3.0 released in 1990. From windows 3.0 the virtual memory had been introduced.
Windows server 2008 released on 27th February 2008. It builds on the technological and security advances first introduced with windows Vista,m and is significantly more modular than its predecessor windows server 2003.
MS-DOS stands for Microsoft disk operating system. Originally developed by Microsoft for IBM,
MS-DOS is the standard OS for IBM-compatible personal computers. The initial versions of DOS were very simple and resembled another OS called CP/M. Subsequent versions became increasingly sophisticated as they incorporated features of minicomputer OS.
DOS was adequate for the IBM-compatible PCs of the early 1980s, but it has certain limitations that became more noticeable as PCs became more powerful.
Advantages Of Advantages And Disadvantages Of Windows Over DOS
a. Windows itself is a big DOS program, but the programs that we run from within windows, like PowerPoint, Outlook Expess etc. Are definitely not DOS programs. These applications can only run within windows. This is because of the internal structure of windows. Windows include all kinds of built-in functions and data.
b .Windows provides functions with the ability to draw text in different styles and sizes that is not provided in DOS. Windows provides a broad range of graphical functions for drawing lines (with different styles) and geometric shapes with different colors. This is not possible under DOS.
c. Windows programs (like excel) makes use of the built in functions and they do not need to
supply the program logic to do their tasks.MS-EXCEL uses those built in functions by
requesting them from windows.
d. Windows applications take up less disk space, and less space in memory, when a window is running already.
e. Windows programs (applications) all seem to have the same “look and feel”, so they are using the same built-in logic to draw text, display menus, draw lines etc. When the user sets up his/her system to run windows, every windows program can take benefit of the configuration (of windows).If a printer is working for one window application, it will be working for every other windows application. Therefore every application will take advantage of windows built-in printing functions, instead of creating them from start. These features eliminate the complex installations of many DOS programs, that must have their own printer installations, memory configuration programs, font data etc. One of the most fundamental advantages of windows is that, it allows many programs to operate at the same time.
e. Beside the program logic (do this first, then do that second etc.), DOS programs deal directly with computer’s hardware to access the monitor’s screen, read the keyboard etc. The main advantage the operating system provides is for disk file access .
f. DOS has limited no of functions to deal with the screen and communication devices. Most DOS programs do not use those features (functions).Therefore; it is mostly faster to deal directly with the computer’s hardware. On the other hand, windows applications interact with the windows environment, not directly with the hardware. If an application decides to read the keyboard, it calls a function within Windows, internally ,windows decodes the function call and translates it into hardware commands.
g. The disk file commands are done via DOS.As we know, window is a DOS program, DOS is always running before window is started, all of the DOS file support functions are available to windows, just like they are available to any other DOS program. Windows designers have taken advantage of DOS to do disk file access. Files created by windows programs are really DOS files i.e. you can create a file using windows “notepad” application and save that file in a floppy disk. And try to run that file using the DOS word processor. The DOS word processor will have no trouble reading that file, even though it was created by a windows program.
h. By using the DOS file functions, there is disadvantage of limiting the file names to 8 characters and three character extension, like “DOSFILE.TXT”.
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