What is the difference between the various DOS versions 100

DOS is the abbreviation of disk operating system, originally invented by IBM, and its original machine with the release, we say pure DOS actually refers to it, its version is the highest, and then it stopped research and development, completely replaced by Windows MSDOS. MSDOS was released by Microsoft, and since Windows 95 OSR2 is embedded), it has gradually replaced IBM DOS and become the so-called pure DOS (i.e., Win9X embedded) that everyone is familiar with today. In fact, there are still differences between these two DOS, and they have coexisted for a long time during the popularity of Win9X, so that everyone doesn't care too much about the difference between IBM DOS and MSDOS.

During this period, other DOS systems also appeared, such as CCDOS, UCDOS, etc., but they were eliminated by the popularization of Windows before they formed a climate.

I've been using computers since I first got into computers, and I've been using IBM for a long time after Winows95 came out, up to this antique level. But Win9X can go directly into MSDOS mode (and there is not much difference between the two, which makes us unconsciously abandon IBM so much that we almost forget that IBM exists today. In fact, IBM is the ancestor of DOS, and we should not forget IBM's outstanding contribution to the development of computer operating systems.

This is a digression, and everyone hurts their eyes, hehe.

Digital Research developed the operating system CP M for the Altair 8800. It quickly became the standard operating system for Intel 8080 chips. That is, the earliest DOS version.

In August of that year, Tim Paterson completed the original operating system, named QDOS, which means:"Simple operating system"（quick and dirty operating system）。

In terms of design, he fully borrowed from CP M, and the user interface and programming interface are almost identical, which makes the application on CP M run directly on QDOS. The biggest change he made was the introduction of the FAT file system of Microsoft's Basic interpreter for QDOS.

In October, IBM decided to launch a PC based on the Intel 8086 chip.

It approached Digital Research and asked for authorization to use the CP M system. However, the agreement was not negotiated. As a result, IBM went to Microsoft and asked Microsoft to provide it with an operating system.

At the time, Microsoft didn't have an operating system product, but Bill Gates knew that SCP was working on QDOS. Microsoft paid $10,000 to SCP to license QDOS.

In July, Microsoft already had a fairly good understanding of the entire design of IBM PCs, and Bill Gates realized the huge size of the future PC market and decided to stop using the license model and buy QDOS directly. This cost Microsoft another $5-70,000. At the same time, Tim Paterson also resigned from SCP, and Microsoft hired him.

Since then, DOS has been upgrading in cooperation with IBM, and major versions have been available since ,,,, so far, MSDOS is no longer upgraded, and the corresponding PCDOS has arrived.

Later, Win95 appeared, and DOS was integrated into WIN as a component, and it was no longer independent.

Check the DOS version method:

1. Start-Run-Enter cmd-OK, and the command prompt pops up.

The DOS system is constantly evolving, the version is constantly updated, and the functions are constantly increasing. There are more domestic editions, including the initial edition, the later edition, and the later edition, edition, edition, edition; Now the most widely used, Shitan is the and version, in addition to the and version of the Ming trace.