Microsoft released version 4.0 and with it XMS memory support and the possibility to include hard drives up to 2GB. Until 3 years later, in 1987, with the release of version 3.3 and the use of hard drives larger than 32 MB, it was allowed to support existing 3.3 and known 3.5″ floppy disks. In the same year, support for MS networks was added in version 3.1. In 1984, Microsoft added support for 1.2 MB high-density disks in MS-DOS 3.0, and the possibility of installing a hard disk with a maximum of 32 MB. In the same year, new keyboard characters were added to version 2.11.

With the version 2.0 that adds support for IBM 10 MB hard drives and the possibility to read 5.25 floppy disks with 360Kb capacity, it wasn’t until 1983 the next year, when the system had more functionality. In 1982, version 1.25 was released, adding support for double-sided floppy disks. Many bugs fixed in PC DOS 1.1 version, support dual-density floppy disks. It contains the COMMAND.COM command interpreter. Supports 16 Kb RAM memory, 5.25 inch single-sided 160 Kb floppy disks. PC DOS 1.0 is the first version of DOS released in 1981 in addition to IBM-PC. VersionsĪmong the versions or developments of the DOS operating system: It begins in 1981 with the acquisition of an operating system called QDOS, which is the first version of the Microsoft MS-DOS 1.0 operating system, after making a few changes.Ī number of changes take place in the operating system until MS-DOS reaches version 7.1, where it ceases to exist and becomes an integrated part of the Windows operating system. Perhaps it is an old and forgotten operating system by most users, but it forms the basis of the most current operating system. If the variation appears first, it means that significant changes have been made to the benefits of new microprocessors, for example, to take advantage of it to a large extent.

Existing versions are used to correct errors detected in the previous version or to improve certain parts of the program. Microsoft has been developing DOS since its first release in 1981. DOS, in addition to an operating system, is a set of programs that allow us to manipulate information on disks so that we can work with them easily, conveniently and quickly Also, DOS coordinates the operation of the microprocessor so everything works fine inside our computer. It is an acronym for an operating system created by Microsoft and installed by most computers.

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