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Windows 9x

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Windows 9x refers to a specific family of operating systems created by Microsoft.

Microsoft Windows 95 logo
Microsoft Windows 95 logo

An operating system is the essential software that manages a computer's hardware and programs. This particular series was released between 1995 and 2000. It was designed primarily for use on home desktop computers. During its peak in 1998, Windows held a massive 82% of the operating system market share. This group of software versions served as a bridge between older computing methods and modern systems. All versions in this series shared an internal version number of 4.x.

The architecture of Windows 9x relied on a specific core called a kernel. This kernel was first introduced with the release of Windows 95. To ensure people could still use older software, Microsoft included support for MS-DOS. This allowed the computer to boot into Windows while providing real mode support for DOS. Real mode is an older way for a processor to operate. By keeping this support, Microsoft allowed the new 32-bit system to communicate with 16-bit software. They used a technique called "thunking" to maintain this Win16 compatibility. However, mixing these different types of code sometimes impacted the stability and efficiency of the system.

There were three main stages in the Windows 9x lineage. The first was Windows 95, which launched on August 24, 1995, with version 4.0. This version was developed under the code-name "Chicago." The second major release was Windows 98, released on June 25, 1998, with version 4.1. It was known during development as "Memphis."

Windows 98 logo
Windows 98 logo

The third and final version was Windows Me, or Millennium Edition, released on September 14, 2000. It carried the internal version number 4.9. Windows Me was intended to be a quick, one-year stopgap project. It was meant to bridge the gap until the next major era of Windows arrived.

The history of these systems involves many years of complex development. Microsoft's first Windows version, 1.0, arrived on November 20, 1985. It was originally called "Interface Manager" until marketing expert Rowland Hanson suggested the name Windows. Later, a chief architect named Dave Cutler helped build a separate professional system called Windows NT. Microsoft also attempted a massive project called Cairo to create a next-generation operating system. Cairo was intended to feature an object-based file system and a new user interface. Unfortunately, Cairo was much more difficult to build than expected. Microsoft cancelled the project after five years of development.

Windows 95 saw many different iterations to improve its features. The original release was known as the RTM version. Later, Microsoft released several "OEM Service Releases," or OSR versions, specifically for computer manufacturers. Windows 95 B, also called OSR2, added support for the FAT32 file system. This was important because it allowed for larger disk partitions. Windows 95 B USB also added basic support for USB connections. The final version of the 95 series was Windows 95 C, or OSR2.5, which included Internet Explorer 4.0. These updates helped the software keep up with changing technology.

Windows 98 brought even more significant technical changes to the home user. It featured improved hardware drivers and much more robust USB support. One major addition was the integration of the Internet Explorer 4 web browser into the Windows shell.

Microsoft Windows Me logo
Microsoft Windows Me logo

In 1999, Microsoft released Windows 98 Second Edition, or SE. This version added a feature called Internet Connection Sharing. This allowed several machines on a Local Area Network (LAN) to share one Internet connection. Many users considered Windows 98 SE to be the most stable release in the entire 9x family.

Windows Me introduced several new tools but faced significant criticism. It included the first version of System Restore, which let users revert their system to a "known-good" state. It also featured Windows Movie Maker and Windows Media Player 7. However, many users found the system to be unstable and prone to crashes. Some critics even called it "Mistake Edition." Unlike its predecessors, Windows Me did not allow users to easily access real mode MS-DOS. This led some users to hack their systems to get that functionality back. Eventually, the Windows 9x era ended when Microsoft released Windows XP. Windows XP moved away from the DOS-based code and moved everything onto the Windows NT codebase.

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File:Windows 98 logo.svg
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