📋 Program Manager

Overview

Windows 3.1 was a graphical operating system for MS-DOS. It introduced TrueType fonts, multimedia capabilities, and OLE (Object Linking and Embedding). It sold over 3 million copies in its first two months.

Key Features

• TrueType font support built-in
• Mimedia extensions (audio, video)
• Object Linking and Embedding (OLE)
• Drag and drop file management
• Improved Program Manager
• Solitaire, Minesweeper games
• Windows File Manager
• Print Manager improvements

💻 System Requirements

Processor	Intel 386 or higher
RAM	1 MB minimum, 2 MB recommended
Hard Disk	6-10 MB free space
Display	VGA or higher
Floppy Drive	3.5" high-density
OS Base	MS-DOS 3.1 or higher
Price	$149.95 retail

🏆 Historical Impact

Windows 3.1 established Microsoft's dominance in the PC operating system market. It was the first Windows version to be widely adopted by both consumers and businesses, setting the stage for Windows 95.

Sold 3 million copies in first 2 months

📋 Windows Explorer

Overview

Windows 95 was a landmark release that introduced the Start menu, taskbar, and the concept of "plug and play." It sold 7 million copies in the first five weeks and fundamentally changed how people interacted with computers.

Key Features

• Start Menu and Taskbar
• Plug and Play hardware support
• Long filename support (up to 255 chars)
• Internet Explorer integration
• Windows Explorer file manager
• 32-bit application support
• Preemptive multitasking
• Built-in networking (TCP/IP)

💻 System Requirements

Processor	Intel 386DX/20 MHz or higher
RAM	4 MB minimum, 8 MB recommended
Hard Disk	50-55 MB free space
Display	VGA or higher
Floppy Drive	3.5" high-density
CD-ROM	Recommended for installation
Price	$209.99 retail ($109 upgrade)

🏆 Historical Impact

Windows 95 launch was a cultural phenomenon with midnight sales events worldwide. The Rolling Stones' "Start Me Up" was used in the $300 million marketing campaign. It sold 40 million copies in the first year.

Sold 40 million copies in first year

📋 NT Workstation

Overview

Windows NT (New Technology) was Microsoft's first fully 32-bit operating system designed for business and enterprise use. It featured true preemptive multitasking, memory protection, and the NTFS file system.

Key Features

• Fully 32-bit architecture
• Preemptive multitasking
• Memory protection between processes
• NTFS file system support
• Hardware Abstraction Layer (HAL)
• Win32 API support
• Multi-processor support (SMP)
• C2 security certification

💻 System Requirements

Processor	Intel 386/25 MHz or higher
RAM	8 MB minimum, 16 MB recommended
Hard Disk	90 MB free space
Display	VGA or higher
Floppy Drive	3.5" high-density
Architecture	x86, MIPS, Alpha, PowerPC
Price	$499.00 retail

🏆 Historical Impact

Windows NT laid the foundation for all modern Windows versions. Its kernel architecture, NTFS file system, and security model are still used in Windows 11 today. It was designed by Dave Cutler, who came from Digital Equipment Corporation.

Foundation for all modern Windows

📋 Windows Explorer

Overview

Windows 98 improved upon Windows 95 with better hardware support, USB integration, and Internet Explorer 4.0. The Second Edition (SE) in 1999 added Internet Connection Sharing and improved USB support.

Key Features

• Internet Explorer 4.0/5.0 integration
• Active Desktop (web content on desktop)
• USB support (mass adoption)
• Windows Driver Model (WDM)
• FAT32 file system support
• Windows Update (online updates)
• Internet Connection Sharing (SE)
• Improved DVD support

💻 System Requirements

Processor	Intel 486DX/66 MHz or higher
RAM	16 MB minimum, 24 MB recommended
Hard Disk	120-295 MB free space
Display	VGA or higher
CD-ROM	Required for installation
Sound	Sound card recommended
Price	$209.00 retail ($109 upgrade)

🏆 Historical Impact

Windows 98 was the last Windows based on the MS-DOS foundation. It bridged the gap between the consumer Windows 95 and the enterprise Windows NT line. USB support in 98 was crucial for the proliferation of USB devices.

Last DOS-based consumer Windows

📋 Windows Explorer

Overview

Windows 2000 was the successor to Windows NT 4.0, bringing NT's stability to a wider audience. It came in Professional, Server, Advanced Server, and Datacenter Server editions.

Key Features

• NTFS 3.0 with file encryption (EFS)
• Active Directory (enterprise)
• Plug and Play support (NT line)
• Internet Explorer 5.0
• Windows Installer service
• Group Policy management
• Improved hardware support
• Recovery Console

💻 System Requirements

Processor	Pentium 133 MHz or higher
RAM	32 MB minimum, 64 MB recommended
Hard Disk	1 GB free space (2 GB recommended)
Display	VGA or higher
CD-ROM	Required (DVD optional)
Network	Network adapter recommended
Price	$319.00 retail ($219 upgrade)

🏆 Historical Impact

Windows 2000 was the bridge between the NT and consumer Windows lines. Its stability and features directly influenced Windows XP, which would become one of the most popular operating systems ever. Active Directory became the standard for enterprise networks.

Bridge to Windows XP

📋 Windows Explorer

Overview

Windows XP (eXPerience) merged the consumer Windows 9x line with the NT kernel, creating a stable, user-friendly operating system. It became one of the most popular and longest-running Windows versions ever.

Key Features

• Luna visual theme (blue taskbar)
• ClearType text rendering
• Remote Desktop (Professional)
• Windows Firewall (SP2)
• System Restore
• Fast User Switching
• Internet Explorer 6
• Windows Media Player
• CD burning built-in
• ClearType for LCD screens

💻 System Requirements

Processor	Pentium 233 MHz or higher
RAM	64 MB minimum, 128 MB recommended
Hard Disk	1.5 GB free space
Display	SVGA 800×600 or higher
CD-ROM	Required (DVD optional)
Sound	Sound card recommended
Price	$299.00 retail ($199 upgrade)

🏆 Historical Impact

Windows XP was supported for over 12 years (until April 2014), making it one of the longest-supported operating systems. At its peak, it ran on over 400 million PCs. The iconic "Bliss" wallpaper is the most viewed photograph in history.

Over 400 million PCs at peak