#Versions of dos software

Almost every software company offered standard applications like word processing, calculation or also special solutions like measurement tools, CAD (Computer Aided Design) or image processing for MS-DOS. The number of the MS-DOS installations grew worldwide to about 60 million and surpassed all other systems with that amount. The easy extendibility of the computer by numerous plug-in cards of third party manufacturers, relatively low acquisition costs and a strongly growing amount of applications was a reason for it.ДЎ988 was MS-DOS established and had reached measured on the market share a monopoly in the DOS market. MS-DOS is already spread worldwide on Intel x86 computers in 1985. IBM published the AT computer in August, this one should refine the market for personal computer with MS-DOS 3.0/3.1. In 1984 the number of PC and MS-DOS resellers increased to over 200. Many other systems lost her market relevance at this time. Microsoft corresponded to the trend and announced a graphical user interface named Windows in 1983. In 1983, the success of the PC system was clear the desire for a graphical surface was rising. Software and hardware manufacturers build on this binary standard at this time. MS-DOS was wide spread in 1982 when 50 companies licensed MS-DOS.

#Versions of dos code

Together with the file io.sys for simple device routines like the access to the monitor, keyboard, fixed storage disks and interfaces as well as the booting code these form the base operating system. The command interpreter is integrated in the file with the internal commands for MS-DOS. MS DOS 1.0 consists of about 4,000 lines assembler code. IBM delivered it on all IBM computers as PC DOS for the first time on the IBM 5150 PC, for all other ones the name MS-DOS was for OEM partner. How proved this was a very lucrative business. After a licence agreement with IBM was signed, Bill Gates bought QDOS for 50,000 dollars in July 1981. At first Microsoft licensed QDOS for 25,000 dollars. QDOS is a 16-bit clone of CP/M and was finished by Tim Paterson in April 1980. Since Microsoft could not sell licenses, a corresponding agreement with the company Seattle Computer Products was reached for QDOS. Microsoft did not have yet any operating system, Microsoft licensed CP/M from Digital Research in November 1977 for 50,000 dollars. Although the company Digital Research of Gary Kildall already had with CP/M 86 such a 16-bit version,but by circumstances no contract has been established with IBM. Microsoft DOS (MS-DOS) Operating System In July 1980 IBM assigned Microsoft to develop a 16-bit operating system for the personal computer for the fee of 186,000 dollars.