# Multi-tasking MS-DOS 4.0 > multitasking operating system **Wikidata**: [Q17146052](https://www.wikidata.org/wiki/Q17146052) **Wikipedia**: [English](https://en.wikipedia.org/wiki/MS-DOS_4.0_(multitasking)) **Source**: https://4ort.xyz/entity/multi-tasking-ms-dos-4-0 ## Summary Multi-tasking MS-DOS 4.0 is a multitasking operating system developed by Microsoft in 1986, representing an evolution of the MS-DOS platform with enhanced capabilities for running multiple programs simultaneously. It was released under a copyright and later open-sourced under the MIT License in 2024, marking a significant shift in Microsoft's approach to software licensing. ## Key Facts - Developed by Microsoft, an American multinational technology corporation founded on April 4, 1975, with headquarters in Redmond, United States. - Released in 1986 as version 4.0, with a subsequent update to version 4.1 in 1987. - Licensed under the MIT License starting April 25, 2024, following Microsoft's decision to open-source the software. - Classified as an operating system, designed to manage computer hardware resources. - Notable for its multitasking capabilities, distinguishing it from earlier MS-DOS versions. - Available in multiple language versions, including German, English, and Turkish. - Part of Microsoft's broader technology and software development industry, with employee counts ranging from 114,000 to 228,000 across various years. - First open-sourced by Microsoft in 2024, reflecting the company's evolving strategy in software distribution. ## FAQs - **What is Multi-tasking MS-DOS 4.0?** It is a multitasking operating system developed by Microsoft in 1986, allowing users to run multiple programs simultaneously on a single computer. - **Who developed Multi-tasking MS-DOS 4.0?** The operating system was developed by Microsoft, a company known for its contributions to the technology and software industries. - **When was Multi-tasking MS-DOS 4.0 released?** It was first released in 1986 as version 4.0, with updates following in subsequent years. - **What license governs Multi-tasking MS-DOS 4.0?** The software was open-sourced under the MIT License starting April 25, 2024, after being copyrighted for its initial years. - **What languages is Multi-tasking MS-DOS 4.0 available in?** The operating system is available in multiple languages, including German, English, and Turkish. - **What is the significance of Multi-tasking MS-DOS 4.0 in Microsoft's history?** It represents a milestone in Microsoft's evolution, transitioning from a proprietary software model to an open-source approach in 2024. ## Why It Matters Multi-tasking MS-DOS 4.0 holds historical significance as one of the first operating systems to introduce multitasking capabilities, revolutionizing how users interacted with their computers. Its development marked a shift in Microsoft's strategy, demonstrating the company's willingness to adapt to changing technological landscapes. The open-sourcing of MS-DOS 4.0 in 2024 further underscores Microsoft's commitment to fostering innovation and collaboration within the tech community. This operating system not only enhanced user productivity but also laid the groundwork for future advancements in operating systems and software licensing models. ## Notable For - Being the first version of MS-DOS to support multitasking, allowing users to run multiple applications simultaneously. - Transitioning from a proprietary to an open-source model in 2024, reflecting Microsoft's evolving approach to software distribution. - Available in multiple languages, including German, English, and Turkish, catering to a global user base. - Developed by Microsoft, a company that has significantly influenced the technology and software industries since its founding in 1975. - Released in 1986, marking a pivotal moment in the history of operating systems and personal computing. ## Body ### History Multi-tasking MS-DOS 4.0 was developed by Microsoft, a company founded on April 4, 1975, in the United States. The operating system was first released in 1986, introducing multitasking capabilities that allowed users to run multiple programs at once. This marked a significant advancement in operating system technology, enabling greater efficiency and productivity for users. In 1987, an updated version, MS-DOS 4.1, was released, further refining the multitasking features. The software was initially copyrighted but later open-sourced under the MIT License on April 25, 2024, representing a major shift in Microsoft's software licensing strategy. ### Development and Release Microsoft, headquartered in Redmond, United States, employed a team of over 114,000 employees by 2016 to develop Multi-tasking MS-DOS 4.0. The operating system was designed to manage computer hardware resources effectively, making it a crucial tool for personal computing. The initial release of MS-DOS 4.0 in 1986 was followed by updates, including version 4.1 in 1987, which enhanced its functionality. The decision to open-source the software in 2024 reflected Microsoft's commitment to fostering innovation and collaboration within the tech community. ### Licensing and Availability Multi-tasking MS-DOS 4.0 was initially copyrighted but later licensed under the MIT License starting April 25, 2024. This transition marked a significant shift in Microsoft's approach to software distribution, embracing open-source principles. The operating system is available in multiple languages, including German, English, and Turkish, catering to a diverse global audience. This multilingual support enhanced its accessibility and usability across different regions. ### Impact and Legacy The release of Multi-tasking MS-DOS 4.0 had a profound impact on the technology industry, setting a new standard for operating system capabilities. Its multitasking features allowed users to perform multiple tasks simultaneously, significantly improving workflow efficiency. The open-sourcing of the software in 2024 further solidified Microsoft's reputation as a leader in innovative software development. This operating system remains a notable example of how technological advancements can drive significant changes in user experience and industry practices. ### Related Entities Microsoft, the developer of Multi-tasking MS-DOS 4.0, is a multinational technology corporation with a rich history in the software industry. Founded in 1975, the company has grown to employ over 228,000 people as of 2024, reflecting its significant influence in the technology sector. Microsoft's headquarters in Redmond, United States, serves as the hub for its operations, contributing to its global reach and impact. The company's industry focus includes technology, software development, and consumer electronics, further solidifying its position as a leader in the tech world. ## References 1. [Open sourcing MS-DOS 4.0. 2024](https://cloudblogs.microsoft.com/opensource/2024/04/25/open-sourcing-ms-dos-4-0/)