[hemmerling] DOS, Microsoft MSDOS, Digital Research DR-DOS, OpenDOS

Pasquale J. Villani "Open Source Depot".

Sourceforge "DOS-C: an MS-DOS compatible OS", Sourceforge "DOS-C: an MS-DOS compatible OS".

Archive.org "General Software, Inc.".

LinkedIn "Steve Jones" - “Author of 6 operating systems, including PCVMS, PCUNIX, Wendin-DOS, OEM DOS, Embedded DOS-ROM, and Embedded DOS 6-XL”.

CompuLab "Embedded DOS-ROM. Full-Featured ROMmable Disk Operating System. User’s Guide with Command Reference" ( PDF ), 1990-1999.

ProSoft "Embedded DOS 6-XL. Full-Featured ROMmable Disk Operating System. User’s Guide with Command Reference" ( PDF ), 1990-1996.

FreeDOS, SourceForge "FreeDOS", SourceForge "FreeDOS".

Geizhals.AT "Hardware / Notebooks / Tablets / Notebooks", Search for "freedos" - Notebooks shipped with FreeDOS.

Microsoft Download Center "MSDOS".

The commercial DRDOS, Inc. "DR DOS".

Udo Kuhnt "The DR-DOS/OpenDOS Enhancement Project".

Ben A. L. Jemmett, Deltasoft - "OpenDOS Unofficial Home Page".

C:\Club Dr-DOS Wiki.

EN.Wikipedia "DR-DOS", DE.Wikipedia "DR-DOS".

FTP Uni Bayreuth "caldera".

Google Code "pcmos386".

EN.Wikipedia "PC-MOS/386", DE.Wikipedia "PC-MOS/386".

PhysTechSoft Ltd. "PTS-DOS 32", "PTS-DOS 2000".

The free Datalight "ROM-DOS Single User Version".

Computer Tech Support Forum by tom's GUIDE - "Datalight romdos free", 2005-05-26.

Book Michael Podanoffsky "Dissecting DOS: A Code-Level Look at the DOS Operating System".

Sourceforge "RxDOS", Sourceforge "RxDOS".

VETUSWARE.COM - the biggest free abandonware downloads collection in the universe: "Mike Podanoffsky RxDOS 6.2 - Distribution Disks.zip".

Thierry_Giron@smtplink.trendmicro.com.

Chip Directory, Operating Systems - Infos by LinkedIn "Steve Jones" about several non-Microsoft DOS implementations.

EN.Wikipedia "DOS", EN.Wikipedia "Timeline of x86 DOS operating systems", DE.Wikipedia "PC-kompatibles DOS".

EN.Wikipedia "DOS Protected Mode Interface".

EN.Wikipedia "CWSDPMI".

EN.Wikipedia "PMODE" ( “PMODE/W” ).

thefreecountry.com "Free DOS Extenders. Run 32 bit protected mode programs on old MSDOS".

Doug Huffman "X-32 VM DOS Extender".

Tenberry Software, Inc..

Archive.org "Rainer Schnitker: RSX Tools for GNU C/C++. GNU C/C++ projects for Win32 and DOS" - 386 DOS extenders “RSX” and “RSXWIN”.

DE.Wikipedia "FIPS (Partitionierungssoftware)".

The freeThomas Mönkemeier "VGA-COPY/386".

The Shareware Archive.org "Vern Buerg, Buerg Software: LIST Plus".

rigacci.org - Biblioteca online, BIOS Firmware Support "DEBUG Script to Disable/Enable Internal Cache on 486 CPUs" → “CACHEON.COM”, “CACHEOFF.COM”.

Doctor DOS Betamax's "DOS Websites Directory".

Richard L. Green "Free Software for DOS".

Dev Anand Teelucksingh "Interesting DOS programs".

haftmann#software Freeware-Angebote - “Es handelt sich hierbei ausschließlich um DOS- und Windows-Programme (eins ist für OS/2)”.

Simtel "msdos / pktdrvr", UK Mirrorservice "Simtel", "msdos / pktdrvr" - Network packet drivers for MSDOS.

Glenn McCorkle "Arachne" - Arachne main site.

Sourceforge "Arachne GPL web browser", Sourceforge "Arachne GPL web browser".

Ron Clarke "Arachne".

EN.Wikipedia "Arachne (web browser)", DE.Wikipedia "Arachne (Browser)".

Lynx.

Caldera WebSpyder.

Kees Stravers PB0AIA "The Net-Tamer DOS PPP offline mail reader".

Michael Bernardi "FAQ: MS-DOS Applications for Internet Use".

FDISK.COM - DOS Internet Pages.

FANSI-CONSOLE by Hersey Micro Consolting, Inc. A special ANSI / VT100 video driver for MSDOS applications. Version 3 is now shareware, version 4 is (still ?) commercial. I own a full license and got both version 3.01k of 04.10.1991 and version 4.00j of 21.11.1991. Are there any newer versions out ?

THE LAST BYTE by Key Software Products. A special MSDOS “upper memory” manager for 386 / 486 / 586 boards with specially supported chipsets, so it just runs on selected computer mainboards. The shareware version may be turned into commercial versions by entering a serial number. I own a full license key and got version 2.11 of 11.08.1992 and version 2.50 of 30.08.1994. I am still looking for a newer version, there must have been such !

LDEVICE - Load Device Driver V2.0 by Adlersparre & Associates Inc., 1803 Douglas Street, Victoria, BC, Canada. A special MSDOS tool to load MSDOS device drivers at runtime.

AXCEL216 "MDGx MAX Speed WinDOwS Tricks + Secrets" - “Tricks • Secrets • Bugs • Fixes, Serving strictly the BEST tweaks to millions of readers since 1993”.

DEW Associates Corporation "Has Real-mode DOS been removed from Microsoft's Windows ® Millennium Edition?".

OpenDirectory "Top: Computers: Software: Operating Systems: x86: DOS".