DOS Timeline

출처 :

Month Year Version Major Changes or Remarks
December 1980 QDOS Microsoft buys non-exclusive rights to market Pattersons Quick & Dirty  Operating System from Seattle Computer Products
(Developed as 86-DOS)
(Which is a clone of Digital Researches CP/M in virtually every respect)
July 1981 86-DOS Microsoft buys all rights to 86-DOS from Seattle Computer Products, and the  name MS-DOS is adopted for Microsoft’s purposes and IBM PC-DOS for  shipment with IBM PCs
(For Computers with the Intel 8086 Processor)
Q3 1981 CP/M 86 Digital Research release CP/M 86 for the Intel 8086 Processer
Mid 1981 PC-DOS 1.0 Pre-Release PC-DOS produced for IBM Personal Computers (IBM PC)  Supported 16K of RAM, ~ Single-sided 5.25″ 160Kb Floppy Disk
August 1982 PC-DOS 1.1 OEM PC-DOS for IBM Corporation. (First Release Version)
September 1982 MS-DOS 1.25 OEM Version for Zenith Computer Corporation.. (Also known as Z-DOS) This  added support for Double-Sided 5.25″ 320Kb Floppy Disks. Previously the disk  had to  be turned  over to  use the other side
Q4 1982 CP/M Plus Digital Research release CP/M Plus for the Intel 8086 Processer
March 1983 MS-DOS 2.0 OEM Version For Zenith – This added support for IBM’s 10 MB Hard Disk,  Directories and Double-Density 5.25″ Floppy Disks with capacities of 360 Kb
March 1983 PC-DOS 2.0 OEM PC-DOS for IBM Corporation. –  Released to support the IBM XT
March 1983 MS-DOS GUI Microsoft first announces it intention to create a GUI  (Graphical User Interface)  for its existing MS-DOS Operating System. Microsoft also introduces its first  mouse, “The Microsoft Mouse”, including card and software, for US$200. A  major tool in its GUI Development Program. (Windows is Born)
November 1983 MS-DOS 2.01 OEM Version for Wang Computer Corporation.
November 1983 PC-DOS 2.1 OEM PC-DOS for IBM Corporation. –  Released to support IBM PCjr PC
November 1983 Microsoft Windows for MS-DOS Microsoft formally announces Windows 1.0, but does not have a working  copy!  Microsoft shows Windows to IBM, but IBM is not interested in such an  unfinished product.
November 1983 Digital Research Meanwhile, Digital Research debuts its GEM GUI for the IBM PC at Fall  COMDEX 1983, and also debuts its first multiuser and multitasking  version of  CP/M, Concurrent CP/M (MP/M) for the Intel-based IBM PC.
December 1983 MS-DOS 2.11

OEM Version for AT&T, Bull & Sony. – Support for foreign and extended  characters was added.


“DOS Menu”

There were also a number of Retail/Freeware Menu or Shell Programs  becoming  available  for DOS to help the novice user and shield him from the  ‘raw’ command  line! Prompting Microsoft to speed up its GUI development work!

Early 1984 MS-DOS 2.25 OEM Version for Unknown Computer Manufacture. (Possibly Zenith)
September 1984 MS-DOS 3.0 OEM Version for Various Manufactures.- Support for High-Density 1.2 MB  Floppy Disks and 32 MB Hard Disks was added. – No extended partitions.
September 1994 PC-DOS 3.0 OEM PC-DOS for IBM Corporation
November 1984 MS-DOS 3.1 OEM Version for Various Manufactures. Network support was added.
> 1985 DOSPlus 1.0 Digital Research release DOSPlus 1.0 as a follow on from CP/M Plus
March 1985 Dr GEM 1.1 A small number of Computer Manufactures start to bundle ‘GEM’ DOS  Manager by Digital Research (Who also published DR-DOS) It stands for  Graphical  Environment  Manager Details & History
September 1985 Dr GEM 1.2 Digital  Research release ‘retail’ GEM version 1.2
November 1985 Microsoft Windows 1.01 Microsoft announces the Retail shipment of Microsoft Windows, a GUI which  extends the features of the DOS operating system. Windows  provides users with  the ability to work with several programs at the same time and  easily switch  between them without having to quit and restart individual  applications. (Retail  Price was US$99) Screenshots
December 1985 PC-DOS 3.2 OEM PC-DOS for IBM Corporation. ~ Support for 3.5″ LD 720Kb Floppy Disks
> 1986 DOSPlus 2.0 Digital Research release DOSPlus 2.0 – Forerunner to DrDOS
> 1986 Dr GEM Amstrad & KayPro bundle ‘GEM’ software with MS-DOS 3.1
April 1986 MS-DOS 3.2 First Retail Release of MS-DOS ~ Support for 3.5″ LD 720Kb Floppy Disks
August 1986 Windows 1.03 Microsofts second release, – MS-DOS version 3.2 support added
January 1987 Windows DDL Volume 1 Microsoft Windows Device Driver Library Volume 1
Additional support for display devices, printers, and pointing devices added
April 1987 OS/2 Microsoft announces MicroSoft Operating System/2 (MS OS/2) a new personal  computer operating system. It has been designed and developed specifically to  harness the capabilities of personal computers based upon the Intel 80286 and  80386 microprocessors. This is the first product to be announced as a result of the  Joint  Development Agreement between IBM and Microsoft announced in August  1985.  –  Intended Replacement for MS-DOS
April 1987 Windows 1.04 – IBM Personal System/2 support added
April 1987 MS-DOS 3.21 OEM Version for Kaypro & Zenith Computer Corporations. (And others)
April 1987 MS-DOS 3.3 MS-DOS 3.3 introduces support for more than one logical drive per hard disk.  Logical drives are treated as completely separate disks under MS-DOS, even  though they may occupy the same physical hard disk. Plus 3.5″ HD 1.44MB Floppy Disk Support + Real Time Support for the  ‘new’ CMOS clock
April 1987 PC-DOS 3.3 OEM PC-DOS for IBM Corporation. Added support for PS/2 Computers
April 1987 MS OS/2 – 1.0 Microsoft & IBM OS/2 Version 1.0 Released
Click here for OS/2 History, Sub-Versions and Resources
Mid 1987 DOSPlus 2.1 Digital Research release DOSPlus 2.1 – Last release before DrDOS 3.31
October 1987 MS LAN Manager Microsoft releases LAN Manager, (Local Area Network) a LAN operating  system add-on that runs on both  MS-DOS and OS/2.
November 1987 Windows 2.0 Microsoft releases Microsoft Windows 2.03 (Retail Packaging however may show  it as Windows 2.0) offering compatibility with  existing  Windows applications and  a  new visual appearance compatible with Microsoft  OS/2 Presentation Manager.  In addition to the new visual appearance,  it uses a  system of overlapping  windows, rather than tiled windows. Windows  2.03 also includes significant  performance enhancements and improved support for expanded memory  hardware. Screenshots
> 1988 Windows/286 Version 2.03 ~ When Windows/386 was released, Microsoft renamed Windows  2.03 to Windows/286 (For the Intel 286) for version consistency, And labelled all  further production accordingly. However it was not replaced by Windows/386, As  both versions were aimed at different processors. Therefore Version 2.03 can be  found labelled under both descriptions.
February 1988 MS-DOS 3.3Plus Extended MS-DOS for Selected OEMs
March 1988 MS-DOS 3.3T Modified MS-DOS 3.3 for Tandy (Radio Shack) Computers as TandyDOS
April 1988 MS-DOS 3.31 Extended Version for Various OEM Manufactures.
May > 1988 DrDOS 3.3x Digital Research release DrDOS 3.31 (No version 3.0  recorded) followed  by a series of OEM  versions.  3.32, 3.33, 3.34, 3.35, 3.40, 3.41 & 3.42  Some releases include a version of GEM Desktop (Called ViewMAX)
July 1988 MS-DOS 4.0 This version provided XMS support, support for partitions on hard disks up to  2.10  GB and a graphical shell. ~ It also contained a large number of bugs and  many  programs refused to run on it.
July 1988 PC-DOS 4.0 OEM PC-DOS for IBM Corporation. (IBM buy rights to future versions of PC-DOS)
August 1988 Windows/286 Version 2.10 ~ Intel 286 Optimised Edition
August 1988 Windows/386 Version 2.10 ~ Intel 386 Optimised Edition (Introduces HIMEM.SYS Driver)
October 1988 MS OS/2 1.10 Microsoft and IBM announce the delivery of the jointly developed  Operating  System/2 (OS/2) 1.1 with Presentation Manager. Presentation Manager  is the  graphical user interface (GUI) for the OS/2 operating system. This is the  second  major release of the Standard Edition of OS/2. (LAN version also released)
November 1988 MS-DOS 4.01 Major Bug Fix for MS-DOS 4.0 (Core Files almost completely rewritten)
November 1988 PC-DOS 4.01 Major Bug Fix for PC-DOS 4.0
December 1988 DrDOS 4.41 Digital Research release DrDOS 4.41 (No Version 4.0 released!)
March 1989 Windows/286 Version 2.11 ~ Intel 286 Optimised Edition
March 1989 Windows/386 Version 2.11 ~ Intel 386 Optimised Edition
April 1989 MS-DOS 4.01a Minor update to MS-DOS 4.01 to include better support as Larger Hard Drives  become available. A File Update is also released to support MS-DOS 4.01
April 1989 Dr GEM 3.13 Last retail release of GEM by Digital Research
April 1989 MS OS/2 – 1.10EE Microsoft and IBM OS/2 1.10 Extended Edition released, with LAN Manager.
June 1989 IBM OS/2 – 1.20 IBM OS/2 1.20 released.
May 1990 Windows 3.0 Microsoft announces the immediate, worldwide availability of Microsoft Windows  3.0, This version offers dramatic performance increases for Windows  applications, advances in ease of use and  aesthetic appeal, and straightforward  integration into corporate computing  environments Network Drivers also made  available.  Screenshots IBM start to offer Windows 3.0 as a PS/2 Option
May 1990 DrDOS 5.0 Digital Research release DrDOS 5.0 – First Retail Version
September 1990   IBM and Microsoft agree to end their development relationship.
April 1991 IBM OS/2 – 1.30 IBM OS/2 1.30 released.
October 1991 Windows 3.0a Maintenance Release of Windows 3.0 focusing on specific problems
April 1991 MS-DOS 5.0 This was a major upgrade. It allowed parts of DOS to load itself in the high  memory area and certain device drivers and TSRs to run in the unused parts of the  upper memory area between 640K and 1024K. This version also added support  for IBM’s new 2.88 MB floppy disks. An improved BASIC interpreter and text  editor were included, as was a disk cache, an undelete utility and a Hard Disk  partition-table backup program . After the problems with MS-DOS 4, it also  provided a utility to make programs think they were running on a different version  of MS-DOS.(SETVER) ~ Restores confidence in DOS after  v4.x  disaster.
June 1991 DrDOS 6.0 Digital Research release DrDOS 6.0 Adds disk compression, disk optimizer, etc.
June 1991 PC-DOS 5.0 IBM PC-DOS 5.0
June 1991 MS-DOS 5UG MS-DOS 5.0 Upgrade Edition for all earler versions (First Upgrade Version)
October 1991 Windows 3.0 with Multimedia Extensions Version 1.0 OEM Windows 3.0 with MultiMedia Extensions v1.0. This version of Windows  was probably a standard version of Windows 3.0a and Microsoft Multimedia  Extensions Version 1.0 being  released as an OEM Multimedia CD-ROM only.  IBM list Windows 3.0 MM as an option for PS/2 Computers
Notes 1991 Tandy Modular Windows Tandy Modular Windows was an OEM Special GUI for Tandy Corp.’s Video  Information System (VIS) Multimedia Player. It was essentially a Windows 3.0  Core Program, But  without any Microsoft Desktop Accessories, Drivers, or a  number of other features. (Not to be confused with Windows 3.0 MultiMedia)
Q3 1991 Windows NT Program New Technology Development Program – NT Operating System was first  intended to be based on OS/2 Technology but was later changed to Windows
Q4 1991 MS-DOS 5.Oa This was a minor update for MS-DOS 5.0 which dealt with possibly catastrophic  problems with UNDELETE and CHKDSK. A File Update  is also released
Q4 1991 MS-DOS 5aUG Replaces MS-DOS 5.0 Upgrade (Details as for MS-DOS 5.0a)
February 1992 PC-DOS 5.0.1 PC-DOS 5.0 Rev 1 (Possibly an update for same reason as MS-DOS 5.0a)
April 1992 Windows 3.1 Microsoft ships Microsoft Windows 3.1 with over 1,000 enhancements. The new  version created unprecedented user demand with over one million advance orders  placed worldwide. ~ 386 Enhanced Mode with minimum 4MB RAM – Operates  in Standard Mode with 2MBs – Added support for Truetype Fonts  Screenshots
April 1992 Win 3.1UG Windows 3.1 Upgrade for Windows 3.0 Users. (Full Version marked Upgrade!)
June 1992 IBM OS/2 – 2.0 IBM OS/2 version 2.0 released. (Microsoft withdraws support for OS/2)
September 1992 PC-DOS 5.0.2 C-DOS 5.0 Rev 2 – To correct errors with Windows 3.1 (EMM386.EXE)
October 1992 Windows for Workgroups 3.1
(WfWG 3.1)
Microsoft announces the worldwide availability of Microsoft Windows for  WorkGroups 3.1 (WfWG) which integrates networking and workgroup  functionality  directly  into Windows 3.1. The product allows common activities of  sending  electronic  mail, scheduling group meetings, sharing files and printers,  managing  calendars, and  working together on groups projects. It can provide  networking  capabilities on its  own, or it can be used as a client on an existing  local area  network. Screenshots (Unlike NT, WfWG is still a MS-DOS GUI)
October 1992 WfWG31AD Windows for Workgroups 3.1 Add-On for MS-DOS Users
October 1992 WfWG31AW WfWG 3.1 Add-On for Windows Users – This package is for machines that  already  have Windows version 3.1 installed. It upgrades Windows by  adding  those files required for the new features  of WfWG 3.1 (Uses Compliance Checking) 
Q4 1992 WindowsNT BETA Windows New Technology – First BETA Testing of Windows NT ~ Microsofts  first true 32bit Operating System.
March 1993 MS-DOS 6.0 This was a catch-up with Novell’s DR-DOS 6. It added a disk-compression utility  called DoubleSpace, a basic anti-virus program and a disk defragmenter. It also  finally included a MOVE command, an improved backup program, MSBACKUP  and multiple boot configurations. Memory management was also improved by the  addition of MEMMAKER. A number of older utilities, such as JOIN and  RECOVER were removed. However DOSSHELLwas still included.
March 1993 MS-DOS6UG MS-DOS 6.0 Upgrade Edition for all earler versions from 3.3 onwards.
March 1993 6.0 Supplemental Microsoft released a Supplemental Update of Earler Files removed from v6.0
May 1993 Windows for PEN  Computing 3.1 Microsofts first attempt at a GUI for Palm and Organiser type small computers. It  used a cut down version of MS-DOS 6.0 & Windows 3.1 with a PEN Driver Set.
Note 1993 Dr PalmDOS Digital Research base their PalmDOS on CP/M with GEM ViewMAX
June 1993 PC-DOS 6.1 IBM starts to number PC-DOS in series with MS-DOS
Q3 1993 NovellDOS 7.0 DrDOS sold to Novell who release it as NovellDOS 7.0 with NetWare
July 1993 WindowsNT 3.1 Windows NT – Designed for Business & Networking Use – Not dependent on  MS-DOS – Uses its own NTFS Bootstrap to install. (Released on 3.5″ Disks)   Link Site Abandoned – New Screenshots to Follow
> > Windows NT Service Packs After the release of NT 3.1 Microsoft began a series of Service Pack Releases,  which included Updates, Patchs as well as New or Updated Network Drivers. The Last  known Service Pack for Windows NT 3.1 was SP-3 (Dated October 1994)
November 1993 MS-DOS 6.2 Extra security was built into DoubleSpace following complaints of data loss.  A  new disk checker, SCANDISK, was also introduced, as well as improvements to  DISKCOPY and SmartDrive (DOSSHELL was removed to the Supplemental Disk Set)
November 1993 MS-DOS62UG MS-DOS 6.2 Upgrade Edition for all earler versions from 3.3 onwards.
November 1993 MS-DOS62SU MS-DOS 6.2 Step-Up for 6.0 Users Only (MS-DOS Step-Up differs from  Upgrade in that it is limited to earler 6x versions only and contains file updates not  complete copies of application files other than IO.SYS & MSDOS.SYS)
November 1993 6.2 Supplemental Microsoft released a Supplemental Update of Earler Files removed from v 6.2  Including DOSSHELL which was removed from 6.2 & later versions.
December 1993 Windows for Workgroups 3.11
(WfWG 3.11)
WfWG 3.11 contains the complete software package for machines that do not  have Windows Operating System version 3.0 or 3.1. It contains all the WfWG  software, including Windows 3.1 functionality, file sharing, printer sharing,  network dynamic data exchange (DDE),  Microsoft Mail, Microsoft Schedule+,  Microsoft At Work PC Fax, Remote Access Services, 32-bit file and disk  access, and advanced security. Screenshots
December 1993 WfWG311AD WfWG 3.11 Add-On for MS-DOS Users.
December 1993 WfWG311AW WfWG 3.11 Add-On for Windows Users -This package is for machines that  already have Windows or WfWG version 3.1 installed. It  upgrades Windows or  WfWG 3.1 by adding those files required for the new features of WfWG 3.11.
December 1993 MSClient 3.0 Microsoft Client for MS-DOS version 3.0 (Network Add-On for MS-DOS)
December 1993 Windows 3.11 With WfWG Compatable Core Files, SVGA & updated drivers Screenshots Windows 3.11 was never marketed as such, It is a Service Release of Windows  3.1 only – The only way to check you have it was to click the ‘About’ Box
December 1993 Win31 Updates Microsoft also made available 2 updates for Windows 3.1 to bring it upto  Windows 3.11 standard ~ 3.11 Core Files and SVGA Driver Updates.
December 1993 PC-DOS 6.3

Replaces PC-DOS 6.1

Q1 1994 MS-DOS 7.0 BETA 1 Work starts on a Enhanced version of MS-DOS for 32bit Windows. At first  based on MS-DOS 6.2 with DoubleSpace but later changed due to legal action.
March 1994 MS-DOS 6.21 Following legal action by Stac Electronics, Microsoft released this interim version  which had DoubleSpace removed This was an interim limited release of  MS-DOS  until  replacement of DoubleSpace ~ Otherwise identical in function to  MS-DOS 6.2
March 1994 MS-DOS621UG MS-DOS 6.21 Upgrade Edition for all earlier versions (No Step-Up Released)
March 1994 6.21 Supplemental Microsoft released a Supplemental Update of Earlier Files removed from v6.21
March 1994 Win32s for Windows 3.1 Win32s is a set of runtime libraries for Windows 3.1, which enable users to run  most Windows NT 32-bit applications on Windows 3.1, without the extensive  hardware requirements of Windows NT.
April 1994 MS-DOS 6.22 Microsoft licensed a disk-compression package called DoubleDisk from  VertiSoft  Systems and renamed it DriveSpace, which was included in this  version. (Other than disk-compression there is no difference to MS-DOS 6.2)
April 1994 MS-DOS622UG MS-DOS 6.22 Upgrade Edition for all earler versions from 3.3 onwards.
April 1994 MS-DOS6.22SU MS-DOS 6.22 Step-Up for 6.0, 6.2, 6.21 Users Only
April 1994 6.22 Supplemental Microsoft released a Supplemental Update of Earler Files removed from v6.22
May 1994 MS-DOS 7.0 BETA 2 Second BETA of WindowsDOS now based on DriveSpace Technology.
September 1994 Chicago Microsoft announces that Microsoft Windows 95 is the official name for the next  version of Windows, code-named “Chicago.” This name was chosen to make it  easier for customers to identify the most current version of Microsoft Windows. It  is a fully integrated 32-bit operating system replacing Windows 3.11, Windows  for  Workgroups 3.11, and MS-DOS as the mainstream desktop operating  system.
Windows 4.0 (95) uses a version of MS-DOS to ‘Bootup’ (MS-DOS 7.0)
September 1994 WindowsNT 3.5 Windows New Technology 3.5
> > NT Service Packs No recorded Service Pack was published for NT 3.5
November 1994 OS/2 Warp 3.0 IBM OS/2 Warp 3.0 released
August 1995 Windows 95 OEM OEM (Pre-Installed) 32bit Processing – Long Filename Support & other major  improvements over Windows 3.x (Still uses original FAT16) DriveSpace Included  Windows 95 supports two new partition types (0E and 0F) to support the logical  block addressing (LBA) INT13h extensions as specified in the Windows 95  Driver Development Kit (DDK).~ Includes Internet Explorer 1.0
August 1995 Windows 95 Retail Windows 95 for Computers without MS-DOS (or earlier MS-DOS Version)  Link Site Abandoned – New Screenshots to Follow
August 1995 Integral MS-DOS 7.0 MS-DOS 7.0 (Also called WindowsDOS) is an integral part of Windows 95.
(It and later versions are NOT available as a Stand-Alone OS)
It provides support for  Long  Filenames only  when Windows is running, but  removes a large number of  other utilities,  some of  which are on the Windows  95 CD versions in the \other\oldmsdos directory. (Reports itself as Windows 95)
August 1995 Win95UG Windows 95 Upgrade for Previous Versions of Windows
August 1995 Educational Pack Discounted Combined Win95 & NT4.0 for Teachers & Students Only.
August 1995 Win95 PlusPack Extras for Win95 such as DriveSpace 3, MS Themes and 3D Pinball Game
August 1995 Win95 CD-ROM Extras & Updates Microsoft release Extra Applications found on 95 CD for Floppy Disk Users.  (This MS page has changed now to the equivalent of ‘WindowsUpdate’)
September 1995 Win95 – DOS 7.0 Supplemental Microsoft release a Supplemental Update of MS-DOS 6.22 Files removed from  Win95 Called OLDDOS.EXE ~ Microsoft still find it difficult to ‘Kill’ DOS
September 1995 WindowsNT 3.51 Updated Release of NT 3.5 with additional network drivers
Link Site Abandoned – New Screenshots to Follow
> > NT ServicePacks The Last  Service Pack for Windows NT 3.51 was SP- 5 (Dated October 1996)
> 1995 Nashville Windows 95 OSR (OEM Service Release) Update Program
> 1995 Cairo Windows NT (4.0) ‘Future Technology’ BETA Program. (Also reported as Detroit)
> 1995 Pegasus Windows CE (Compact Edition) Development Program – Based on Windows  95  and designed for the Handheld PC  (H/PC) and Portable PC (P/PC) also  known  as Personal Digital Assistants (PDA) ~ The Windows CE series is  included  to complete the Windows Range.
February 1996 Windows 95A OSR 1.0 (As with later sub-versions of OSRs – Pre-Installed) IE 2.0 Included.
February 1996 Win95 SP1 Service Pack 1 for Windows 95 (95A Upgrade) This was the only Windows 9x  Service Pack, After this MS placed further updates on internet ‘WindowsUpdate’ Web Site.
August 1996 WindowsNT 4.0 Microsofts (Cairo) 32bit Muli-Tasking Operating System. Available in Server,  Desktop and Upgrade Versions. (Development continues for Option & Enterprise) Link Site Abandoned – New Screenshots to Follow
> > NT ServicePacks The Latest Service Pack for NT 4.0 is SP – 6a (Dated December 1999)
August 1996 OS/2 Warp 4.0 IBM OS/2 Warp 4.0 released
September 1996 Windows 95B OSR 2.0 (Mainly a Floppy Disk Release) – Windows 95 OSR 2 onwards support  two new partition types (0B and 0C) to support the FAT32 file system.  Maximum  partition size now 2 TeraBytes (TB) But still 2.1 GBs if is FAT16  selected.
September 1996 Windows 95B CD OSR 2.1 with added USB Support (CD-ROM Versions Only) IE 3.0 Included.
September 1996 Integral MS-DOS 7.10 Updated  MS-DOS 7.10 is an integral part of OSR 2 and later versions of  Windows. The main change is support for FAT 32, a  more efficient and robust  way of  storing Data on Large Hard Disks. (‘Large Disk Support’ is an Option in  FDISK)
November 1996 WindowsCE 1.0 Pegasus ~ All versions of Windows CE are OEM releases only.
Late 1996 Windows NT5 Windows NT 5.0 Development Program. Windows NT Background & History
April 1997 PC-DOS 7.0 PC-DOS 7.0 Revsion 0 – Update available to Revsion 1 (PC-DOS 2000) from IBM
September 1997 NT5 BETA Windows NT 5.0 BETA Program. Click here for NT5/2000 Build TimeLine
November 1997 Windows 95C OSR 2.5 with Integrated Internet Explorer 4.0 (Improved USB Support) Some  issues of 95B/C Install CD-ROMs were ‘Bootable’ Dependent on BIOS Support.
November 1997 WindowsCE 2.0 Mercury ~ Successor to Windows CE 1
November 1997 OpenDOS 7.01 DrDOS sold to Caldera who release it as Caldera OpenDOS 7.01
December 1997 WinNT 4.0 OP NT 4.0 Option Pack
December 1997 WinNT 4.0 Ent NT 4.0 Enterprise Version
> 1997 Memphis Windows 98 BETA Program
February 1998 DR-DOS 7.02 Caldera release OpenDOS 7.02 (Then rename it as DR-DOS 7.02)
April 1998 PC-DOS 2000 PC-DOS 7.0 Revsion 1 – Fully Y2K Compliant Update
Q2 1998 WindowsCE 2.01 Gryphon ~ First Microsoft P/PC OS
June 1998 Windows 98 OEM OEM (Pre-Installed) With full FAT32 & USB Support and Integrated Internet  Explorer 4.0 (Install CD-ROM is now ‘Bootable’)
June 1998 Windows 98 Retail Windows 98 for Computers without MS-DOS Link Site Abandoned – New Screenshots to Follow
June 1998 Win98 UG Windows 98 Upgrade for Previous Versions of Windows
June 1998 Educational Pack Discounted Combined Win98 & NT4.0 for Teachers & Students Only.
June 1998 Win98 PlusPack ‘Extras’ that could have been included on 98 CD! (Say no more!)
July 1998 WindowsCE 2.1 Birch ~ P/PC Release
August 1998 NT5 BETA 2 Windows NT5 Beta 2 (Becomes Windows 2000 Beta 2)
Q3   Win CE 2.11 Pro Jupiter ~ CE 2.11 Professional ~ H/PC Release
April 1999 Win2000 BETA 3 Windows 2000 Beta 3
Q2 1999 Neptune Planned successor to Windows 98 (Cancelled Early 2000) See Whistler
Q2 1999 Odysee Planned successor to Windows NT5 (2000) (Cancelled) See Whistler
May 1999 Win98 SP1 Service Pack 1 for Windows 98 (Major Bug Fixes plus IE 4.01 SP1)
May 1999 Windows 98SE OEM OEM (Pre-Installed) Win98 Second Edition – Integrated Internet  Explorer 5.0
May 1999 Windows 98SE Retail Windows 98SE for Computers without MS-DOS or Windows
May 1999 Win98SE UG Windows 98SE Upgrade for Previous Versions of Windows
May 1999 Educational Pack Discounted Combined Win98se & NT4.0 (SP-5) for Teachers &  Students Only.
July/August 1999 Millennium Millennium Edition (WinMe) BETA Testing Program
Still rallies on MS-DOS (No longer supports Real Mode)  (MS-DOS 8.0)
August 1999 DR-DOS 7.03 Caldera release DR-DOS 7.03 then transfer all rights to Lineo,  Corp
Q3 1999 WindowsCE 2.11 Wyvern ~ P/PC release
> 1999 WinMe BETA Click here for the Full Windows Me TimeLine with Build Numbers.
End 1999 DR-DOS 7.04 Lineo release OEM version as DR-DOS 7.04
Early 2000 DR-DOS 7.05 BETA Lineo BETA Test OEM DR-DOS 7.05 but then discontinue DR-DOS  development.
Q1 2000 Whistler Planned future merge of Windows 98, Millennium and NT(2000) into 1 OS
February 2000 Windows 2000 Professional Windows 2000 Professional (NT & Network Users) NO MS-DOS Support  Successor to Windows NT 4.0 – Designed for Business Use. Available in Server,  Desktop and Upgrade Versions.
> > NT Service Packs The Latest Service Pack for Windows 2000 is SP-2 Dated May 2001
May 2000 WindowsCE 3.0 For Microsoft’s Pocket PC Handheld Devices. A Major Revamp! 2 code-names  have been reported = Rapier for P/PC 2000 and Galileo for H/PC 2000
August 2000 Windows Me OEM OEM (Pre-Installed) For Home Users with Integrated Internet Explorer  &  Outlook Express 5.5 and MSN Messenger – Gold Release 4.10.3000
(ME as in Millennium Edition or Me as in I myself ?)
September 2000 Windows Me Retail for Computers without MS-DOS or Windows
Link Site Abandoned – New Screenshots to Follow
September 2000 Integral MS-DOS 8.0 Major change to MS-DOS 8.0 is the removal of ‘Real-Mode’ Support. Other  than  that it is identical to MS-DOS 7.10 (This is done by changes to IO.SYS &  COMMAND.COM)
September 2000 WinMe Step-Up Limited Promotional Step-Up Version for Windows 98/98se Users Only
September 2000 WinMe UG Windows Millennium Upgrade for Previous Versions of Windows (Not 3.x)
April 2001 WindowsCE Talisker
Microsoft Announces Beta 1 of “Talisker,” the Next Version of Windows CE
>>>>>>> 2001 Windows XP is the release name for Windows Whistler and was released on  October 25 2001 Due to the large number of ‘Builds’ it has not been  possible to  keep  listing them! – Read –
???????? 2002 Now that Windows no longer uses a MS-DOS loader or supports it in  any way. It is time to close the DOS Timeline. I enjoyed doing  it, but  now is the time to STOP. For New and Breaking News on  Windows  and its Future visit

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