Meaning of Windows Vista

The current version of Windows for the desktop. Released in late 2006 for businesses and early 2007 for consumers, Vista is available in six versions (see Windows Vista versions). Vista adds numerous features, including improved security (see NGSCB) and greater support for digital rights management. Requiring more memory than Windows XP, at least 1GB is recommended, with 2GB being a safer bet. The next major upgrade to follow Vista is expected in 2010 (see Windows 7).

sytem requirements of MS DOS

The following are the requirements for executing CLAIMS. Higher

values may yield better performance depending on various factors,

and in some special circumstances, lower values may actually

work, but are not supported.

1) A 386sx-class PC or better

2) Client operating system requirements:

16-bit character mode: MS-DOS 5.0 or Windows 3.1 or higher

32-bit character mode: MS-DOS 6.22 or Windows 95/98 or NT

32-bit gui-mode: Windows 95/98 or NT

3) Memory requirements: all numbers reflect the amount of memory that

must be available to CLAIMS

16-bit character mode: 512 KB free conventional

1,024 bytes free environment space

120 available file handles

32-bit character mode: 512 KB free conventional

3.1MB free EMS (expanded) or XMS (extended)

1,024 bytes free environment space

120 available file handles

32-bit gui-mode: 64 MB RAM

4) Disk Space required for programs

16-bit character mode: 30 MB

32-bit character mode: 45 MB

32-bit gui-mode: 65 MB

5) Disk Space required for data: 120 MB minimum (1 GB recommended)

6) OPERATING SYSTEM SPECIAL PARAMETERS

The following are in addition to the above requirements. These

vary with the combination of client and server operating systems

in use.

The most important issue with recent versions of Windows and

networking software is the introduction of write caching of data

at the client. This is a way of "cheating" to improve network

throughput. It is also a way to guarantee that data being shared

from a central server will get corrupted on a multi-user system.

YOU MUST DISABLE THIS DATA CACHING unless you are using a

client/server database such as Btrieve, DB2, Oracle, SQL Server,

etc.

Another performance improvement technique which is inadvisable in

most circumstances has to do with file and record locking for

handling multi-user updating of the database. The technique is

referred to as "Opportunistic Locking." If you use it, it will

become an opportunity to corrupt your database. It should be

disabled.

Disadvantages of MS DOS

Disadvantages:

There is no GUI. (excluding DOSSHELL and other 3rd party GUI's). Interface on a base install is command line only.
Since BG declered that "DOS is dead" we have to put uo with his propoganda why we should upgrade to Windows XP because "DOS is dead".
More difficult to use than Windows.

advantages of MS DOS

Advantages:

Commands are simple to renember and use.
DOS is a very stable OS. I only had it crash once.
DOS is the underlying OS on all Windows products today discounting the NT line (NT, Win2000, Win XP).
DOS does not take up that much space on a hard drive, (only around 8 MB for a full install).
Very portable (look at bootdisks, although the fuctionality is not near that of a full OS, it works great for rescuing a crashed hard drive, Fdisking, formatting hard drives, and running old DOS apps that will not run with Windows or newer versions of DOS).
DOS is a contraction for Disk Operating System.
DOS is very stable, I have only once had DOS crash on me.
DOS is cheap, and free if you go on the internet.
Very fast even on a reletivly slow machine.

MS DOS Operating System

Microsoft's disk operating system, MS-DOS, was Microsoft's implementation of DOS, which was the first popular operating system for the IBM PC, and until recently, was widely used on the PC compatible platform. It was originally released with the PC in 1981 and had seven major versions before Microsoft stopped development in 1995. It was the key product in Microsoft's growth from a programming languages company to a diverse software development firm, providing the company with essential revenue and marketing resources.