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Software company
Watcom International Corporation was a software company, which was founded in 1981 by Wes Graham and Ian McPhee. Founding staff (Fred Crigger, Jack Schueler
Watcom
Commercial product for developing code
Watcom C/C++ (currently Open Watcom C/C++) is an integrated development environment (IDE) product from Watcom International Corporation for the C, C++
Watcom_C/C++
Calling conventions used in x86 architecture programming
"Open Watcom 2.0 C/C++ User's Guide". open-watcom.github.io. Retrieved 2026-06-27. "Calling_Conventions: Specifying_Calling_Conventions_the_Watcom_Way"
X86_calling_conventions
X86 assembler
Open Watcom Assembler (WASM) is an x86 assembler produced by Watcom, based on the Watcom Assembler found in Watcom C/C++ compiler and Watcom FORTRAN 77
Open_Watcom_Assembler
Relational database management system
transfer mechanism. Initially created by Watcom as Watcom SQL. Version 3: 1992 Watcom acquired by Powersoft in 1993; Watcom SQL shipped with their visual programming
SQL_Anywhere
Implementation of the GNU toolchain for DOS
back to 16-bit DOS calls for basic OS support. However, unlike the Open Watcom C/C++ compiler, it is not a zero-based flat model due to preferring NULL
DJGPP
Software license
Open Watcom Public License is a software license that has been approved by the Open Source Initiative. It is the licence under which the Open Watcom C/C++
Sybase Open Watcom Public License
Sybase_Open_Watcom_Public_License
General-purpose programming language
implementations pcc, GCC, Clang, Intel C, C++Builder, Microsoft Visual C++, Watcom C Dialects Cyclone, Unified Parallel C, Split-C, Cilk, C* Influenced by
C_(programming_language)
Family of operating systems for IBM PC compatibles
Microsoft Macro Assembler, Microsoft C, and CodeView from Microsoft Watcom C/C++ from Watcom Turbo Pascal, Turbo BASIC, Turbo C, Turbo Prolog, and Turbo Assembler
DOS
Discontinued C IDE and compiler
competed with other professional programming tools, such as Microsoft C, Watcom C, and Lattice C, while Turbo Pascal was successful with hobbyists and schools
Turbo_C
Open-source x86 virtualization application
the BIOS for VirtualBox requires the Open Watcom compiler, which is released under the Sybase Open Watcom Public License. The Open Source Initiative
VirtualBox
Canadian computer scientist
1981 senior members of CSG incorporated Watcom, the University's first software spin-off company. At Watcom Stepien was responsible for the development
Terry_Stepien
Enforcement of legal rights in all derivatives of a work
impact on linked components licenses.[citation needed] The Sybase Open Watcom Public License is a software license similar to copyleft licenses, but it
Copyleft
Phoenix software company, developer of DOS/4GW and DOS/4G protected-mode extenders
compilers and engineering tools. Watcom licensed DOS/4G and bundled a royalty-free run-time version, DOS/4GW, with its Watcom C/C++ compiler. Developers who
Tenberry_Software
Application debugger for Microsoft Windows
also be used in place of Dr. Watson. The Watcom C Compiler includes a similar crash-analysis tool named "Dr. Watcom". Beginning with Windows XP, Dr. Watson
Dr._Watson_(debugger)
General-purpose programming language
Fortran, Intel, Hitachi, Lahey/Fujitsu, Numerical Algorithms Group, Open Watcom, PathScale, PGI, Silverfrost, Oracle Solaris Studio, VAX/DEC/VSI, others
Fortran
Free, open source, cross-platform IDE
Mingw-w64, Digital Mars, Microsoft Visual C++, Borland C++, LLVM Clang, Watcom, and LCC. The Code::Blocks debugger has full breakpoint support. It also
Code::Blocks
General-purpose programming language
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
C++
Command-line compilation tool
available in FreeDOS. This implementation is licensed under the Sybase Open Watcom Public License. Windows XP and later versions include exe2bin and other
Exe2bin
C programming language standard, 1999 revision
Microsoft. 27 March 2020. Retrieved 17 September 2020. "C99 compliance in Open Watcom". Archived from the original on 3 May 2015. Retrieved 25 September 2015
C99
First-person shooter engine
Windows build using the Watcom C++ compiler, which was the compiler used for the original DOS build (despite being compiled with Watcom C++, Build is plain
Build_(game_engine)
Set of memory models of the x86 CPU
Retrieved September 13, 2011. "Open Watcom C Language Reference version 2" (PDF). github.com/open-watcom. Open Watcom. Retrieved January 10, 2018. "System
X86_memory_models
Canadian computer scientist
co-founded Watcom with other associates of Graham. Watcom is characterized as the first spin-off company to come from Waterloo. McPhee became Watcom's President
Ian McPhee (computer scientist)
Ian_McPhee_(computer_scientist)
C programming language standard, 2011 revision
vasprintf and open_memstream. The few open-source implementations include Open Watcom C/C++'s "Safer C" library and safeclib. Compatibility of C and C++ Outline
C11_(C_standard_revision)
Compiler for the C programming language
C-like language. Java Card, a similar subset of a larger language Open Watcom C/C++ - free x86 C/C++/Fortran compiler for DOS, OS/2, Windows, Linux Bellard
Tiny_C_Compiler
Fortran software and development tools
open-source compiler that has been terminated and ran on Linux Open Watcom — Open Watcom is current, runs on MS-DOS and OS/2, and has IDE support. Oracle
List of Fortran software and tools
List_of_Fortran_software_and_tools
1997 action-adventure game
was developed using Visual C++ v2.0. The DOS version was developed using Watcom C/C++ v10, Microsoft MASM 6.1, and Rational Systems DOS extender (DOS4GW)
Grand_Theft_Auto_(video_game)
Boot loader
is an Open Watcom Port of XOSL. XOSL is developed by Geurt Vos using the Borland C++ 3.1 tool set while XOSL-OW is based on the Open Watcom version 1.8
XOSL
Software program expanding DOS memory
DOS/4GW 1.95 was a free limited edition of DOS/4G and was included with the Watcom C compiler with a commercial re-distribution license. It was made widely
DOS/4G
Implementation of the Fortran computer programming language
develop a FORTRAN 77 compiler was started at Watcom Systems Inc. Under the leadership of Jack Schueler, Watcom employees and undergraduate students from
WATFIV
Database software
3.1x, incl. Windows for Workgroups (Win16) W2 Extended Windows (32-bit Watcom Extender) W3 Windows 95, Windows NT (Win32) W9 Windows 95 WT Windows NT
Btrieve
Canadian computer scientist
one of the founders of Watcom. Watcom's other products were written in the Waterloo Systems Language. Watcom developed Watcom C and several other successful
F._David_Boswell
also frequently used for research Portable C Compiler [C] [Unix-like] Open Watcom [C, C++, and Fortran] [Windows and OS/2, Linux/FreeBSD WIP] TenDRA [C/C++]
List_of_compilers
Gradient boosting machine learning library
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
XGBoost
Turbo C — Borland's C compiler for DOS Watcom C Compiler — C compiler originally by Watcom, later Open Watcom project Zortech C — early commercial compiler
List_of_C_software_and_tools
Standards for the C programming language
clang, and have its support) LabWindows/CVI LCC Oracle Developer Studio OpenWatcom (C89/90 and some C99) Pelles C (C99 and C11. Windows only.) vbcc (C89/90
ANSI_C
Sybase subsidiary
devices with PC applications. Watcom International Corporation was founded in 1981 in Waterloo, Ontario, Canada. Watcom produced a variety of tools, including
Sybase_iAnywhere
Annual expo of Commodore computers
Winston; Houghton Mifflin; Mastertronic; TPUG; The Transactor; Vaisala; and Watcom. The third annual World of Commodore expo was held at the International
World_of_Commodore
Computer vision library
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
OpenCV
C++ IDE
declare every pointer as "char huge *" etc - unlike both Microsoft and Watcom compilers. 5.01 (1996-09-03(base, Development Suite, Design Tools)): Base
Borland_C++
Library of C programs
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
C_date_and_time_functions
Mathematical computing environment
their machines.[citation needed] In 1984, the research group arranged with Watcom Products Inc to license and distribute the first commercially available
Maple_(software)
Book by Brian Kernighan and Dennis Ritchie
KDevelop LabWindows/CVI Microsoft Visual Studio MonoDevelop NetBeans IDE OpenWatcom Oracle Solaris Studio Pelles C IDE Qt Creator SlickEdit Ultimate++ Understand
The_C_Programming_Language
Topics referred to by the same term
mining education institution in Kalgoorlie and Perth, Western Australia Watcom Assembler, an x86 assembler Merdei Airport (ICAO code), in Indonesia This
WASM
C/C++ directive to block repeated header inclusions
Keil Microcontroller Tools: C/C++ compilers Yes (e.g. KEIL ARMCC 5) OpenWatcom Yes Oracle Developer Studio C/C++ Yes (since 12.5) Portland Group C/C++
Pragma_once
Microsystems ? ? Sun Public License Sun Microsystems ? ? Sybase Open Watcom Public License Open Watcom —N/a 2003-01-28 Zope Public License Zope Foundation 2.1 ?
Comparison of free and open-source software licenses
Comparison_of_free_and_open-source_software_licenses
Canadian computer scientist and professor
former students of theirs, formed the University spin-off software company Watcom, which was sold to Powersoft in 1994, for $100 million CAD. Powersoft was
Wes_Graham
High-level programming language
that runs on IBM mainframes. OS/2 has a visual development system from Watcom VX-REXX. Another dialect was VisPro REXX from Hockware. Portable Rexx by
Rexx
C SmartEiffel Stalin Steel Bank Common Lisp TenDRA Tiny C Vector Pascal Watcom C/C++ XPL YARV Yabasic York Haskell Zig Compiler Bugzilla Mantis Mindquarry
List of free and open-source software packages
List_of_free_and_open-source_software_packages
Software library for the C++ programming language
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
Standard_Template_Library
Programming language
an index matching the same expression. FoxPro 2 was originally built on Watcom C/C++, which used the DOS/4GW memory extender to access expanded and extended
FoxPro
Header file for C programs
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
Stdarg.h
Standard library for the C programming language
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
C_standard_library
C compiler for Unix and Unix-like operating systems
Free and open-source software portal Amsterdam Compiler Kit Clang Open Watcom Johnson, S.C. (1978). "A portable compiler: Theory and practice". Proceedings
Portable_C_Compiler
C standard library header file
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
C_mathematical_functions
Computer programming language
Clang, Intel C++ Compiler (ICC), Microsoft Visual C++ (6.0+), Borland C++, Watcom C, Pelles C and Sun Studio. Harbour can make use of multiple Graphical Terminal
Harbour (programming language)
Harbour_(programming_language)
Imperative, procedural programming language
generates C source code and the GNU compiler collection (GCC) and Open Watcom compilers are supported. Alternatively, Euphoria programs may be bound with
Euphoria (programming language)
Euphoria_(programming_language)
Type of computer software program
that brought protected mode DOS programs to a mass market. Included with Watcom's C, C++, and Fortran compilers for 386 class processors, it soon became
DOS_extender
Technica. Archived from the original on 2019-04-11. Retrieved 2019-06-03. Watcom Archived 2010-07-24 at the Wayback Machine on gnu.org Foley, Mary Jo (2019-03-06)
List of formerly proprietary software
List_of_formerly_proprietary_software
Assembler for Intel microprocessors
C++Builder and RAD Studio. JWasm Macro Assembler, licensed under the Sybase Open Watcom EULA. Last updated in 2014. Pelle's Macro Assembler, a component of the
Microsoft_Macro_Assembler
Novell-compatible computer-readable software
kernel integrity. Official compilers that produce NLMs are: Watcom C/C++ compiler / OpenWatcom Metrowerks CodeWarrior for NetWare EPC C/C++ Novell NLMLINK
NetWare_Loadable_Module
Implementation of C standard library for embedded systems based on Linux
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
UClibc
Executable packer software
8086/DOS files: DOS/COM (including some binary images) DOS/EXE DOS/SYS Watcom/LE (used by DOS4G, PMODE/W, DOS32A and CauseWay)[citation needed] TMT/adam
UPX
the gcc compiler the uppercase .C extension indicates a C++ source file. Watcom C/C++, Borland C/C++, gcc and other C compilers C Unix file archive COMPACT
List of filename extensions (A–E)
List_of_filename_extensions_(A–E)
Technique in compiler construction
__1cBh6F_v_ Tru64 C++ v6.5 (ARM mode) h__Xi h__Xic h__Xv Tru64 C++ v6.5 (ANSI mode) __7h__Fi __7h__Fic __7h__Fv Watcom C++ 10.6 W?h$n(i)v W?h$n(ia)v W?h$n()v
Name_mangling
Collection of C++ libraries
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
Boost_(C++_libraries)
Microsoft's core set of application programming interfaces on Windows
files. For the language C++, Zortech (later Symantec, then Digital Mars), Watcom and Borland have all produced well-known commercial compilers that have
Windows_API
REXX GUI development system for OS/2
is a highly extensible REXX GUI development system for OS/2 developed by Watcom and initially released in 1993. Much of the new code in eComStation and
VX-REXX
Fortran compiler
Code::Blocks Eclipse IDE Emacs Geany IntelliJ IDEA KDevelop NetBeans OpenWatcom Simply Fortran Vim Visual Studio Visual Studio Code Fortran compilers Absoft
GNU_Fortran
City in Ontario, Canada
1994 issue of the Financial Post mentioned Waterloo-based companies MKS, WATCOM, and Open Text in a list of the top 100 independent software companies in
Waterloo,_Ontario
American computer scientist
Code::Blocks Eclipse IDE Emacs Geany IntelliJ IDEA KDevelop NetBeans OpenWatcom Simply Fortran Vim Visual Studio Visual Studio Code Fortran compilers Absoft
John_Backus
"Various Licenses and Comments about Them – Sybase Open Watcom Public License version 1.0 (#Watcom)". gnu.org. Archived from the original on 24 July 2010
List of proprietary source-available software
List_of_proprietary_source-available_software
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
Split-C
Dynamic memory management in the C programming language
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
C_dynamic_memory_allocation
Executable file format used for .EXE files in MS-DOS
created by linkers, like Digital Mars Optlink, MS linker, VALX or Open Watcom's WLINK; additionally, FASM can create them directly. DOS DOS extender Portable
DOS_MZ_executable
Object-oriented framework for software development
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
Qt_(software)
IDE for the C programming language
QuickBASIC - similar development environment for BASIC programming Open Watcom C/C++ - free x86 C/C++/Fortran compiler for DOS, OS/2, Windows, Linux "Microsoft
QuickC
Open Watcom Assembler (HJWASM a.k.a. UASM, JWASM, WASM) Watcom Linux, Windows, DOS, FreeBSD, OS/2 approved by OSI, but not by FSF Sybase Open Watcom Public
Comparison_of_assemblers
Personal computer
interface and the Cemcorp-developed text editor application. The various Watcom programming languages were quickly ported to the system, but beyond that
ICON_(microcomputer)
Programming language
KDevelop LabWindows/CVI Microsoft Visual Studio MonoDevelop NetBeans IDE OpenWatcom Oracle Solaris Studio Pelles C IDE Qt Creator SlickEdit Ultimate++ Understand
Outline of the C programming language
Outline_of_the_C_programming_language
GNU implementation of the standard C library
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
Glibc
Subroutine available to applications that access relational database management systems
as PL/Tcl, PL/Perl or PL/Python SAP HANA SQLScript or R SAP ASE Transact-SQL SAP SQL Anywhere T-SQL, Watcom SQL, Java, or C/C++) SQLite Not supported
Stored_procedure
Topics referred to by the same term
Certified. Wound Care Nurse Certification; see list of nursing credentials Watcom C Compiler WCC (radio station), a ship-to-shore radio station originally
WCC
Imanet – international trade software Sitebrand – online marketing company Watcom International Corporation – acquired by Sybase Aeropostale Canada – subsidiary
List of defunct Canadian companies
List_of_defunct_Canadian_companies
Notable software packages that are nominal IDE
Java Yes Yes No No Yes No Yes Yes ? 2025-08-22 External Yes OpenWatcom Sybase Open Watcom Public License No (32-bit only) Partial No FreeBSD, DOS C/C++
Comparison of integrated development environments
Comparison_of_integrated_development_environments
Algorithm for generating pseudo-randomized numbers
in lrand() glibc (used by GCC) 231 1103515245 12345 bits 30..0 ANSI C: Watcom, Digital Mars, CodeWarrior, IBM VisualAge C/C++ C90, C99, C11: Suggestion
Linear_congruential_generator
Network WAP—Wireless Access Point WAP—Wireless Application Protocol WASM—Watcom ASseMbler WAVE—Wireless access in vehicular environments WBEM—Web-Based
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Programming language
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
Cilk
Widget toolkit
Visual C++ 5.0+ Borland C++ (dropped in 3.1.5) 5.5+ C++Builder 2006+ Watcom C++, OpenWatcom 10.6+ CodeWarrior 7+ Cygwin 1.5+ MinGW 2.0+ Digital Mars C/C++ compiler
WxWidgets
Software reverse engineering tool
Builder v4 for DOS/Windows GNU C++ for Cygwin Microsoft C QuickC Visual C++ Watcom C/C++ (16/32 bit) for DOS & OS/2 ARM C v1.2 GNU C++ for Unix/common IDA
Interactive_Disassembler
Canadian technology award
and was also responsible for several spin-off organizations, including Watcom in 1981. He was made a member of the Order of Canada in April 1999. He died
J._W._Graham_Medal
Integrated development environment product
support, QuickC for interactive development, and CodeView debugger. Although Watcom C produced slightly faster code, the magazine said that developers "might
Microsoft_Visual_C++
1994 video game
began, the team ported the engine used for the Ultima Underworld games into Watcom C/C++, using 32-bit code. The updated engine allows the player to look in
System_Shock
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
Blitz++
Object-oriented programming language
IAR Embedded Workbench ICC LCC Norcroft C PCC SDCC TCC Visual C++ (MSVC) Watcom C/C++ IDEs Anjuta CLion Code::Blocks CodeLite Eclipse Geany GNOME Builder
C*
American software company
Zortech ran faster than executables produced by Microsoft C 5.1 and by Watcom C 6.5. Stanley B. Lippman wrote that Zortech was the first C++ compiler
Digital_Mars
Topics referred to by the same term
binary help file created after compiling IPF help source with IBM or Open Watcom's help compiler. Informatics (academic field), the science of information
INF
Freeware file manager for Microsoft Windows
university and released as freeware in 1997. It was originally written in Watcom C++, later in Visual C++ 6.0. Altap Salamander 2.0 the first shareware version
Altap_Salamander
Set of rules defining correctly structured C++ program
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
C++_syntax
Programming language
Dev-C++ Eclipse CDT Geany KDevelop Microsoft Visual Studio NetBeans OpenWatcom Qt Creator SlickEdit Ultimate++ Understand Visual Studio Code Xcode C++
Outline of the C++ programming language
Outline_of_the_C++_programming_language
WATCOM
WATCOM
WATCOM
WATCOM
Boy/Male
Sikh
Immersed in the Love of divine
Boy/Male
Gujarati, Hindu, Indian, Kannada, Telugu
The Son of Goddess Uma Parvati; Son of Goddess Uma; Goddess Parvati
Female
Hindi/Indian
(पूरà¥à¤£à¤¿à¤®à¤¾) Variant spelling of Hindi Purnima, POORNIMA means "full moon."
Girl/Female
Arabic, Muslim
Blue Lotus Flower
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
The Sun; Lord Surya (Sun); One who Gives Light
Girl/Female
Muslim/Islamic
Happy
Female
Native American
Native American Cheyenne name OMINOTAGO means "beautiful voice."
Biblical
that extends or multiplies the hole; whiteness
Boy/Male
Tamil
Pardhu | பாரà¯à®¤à¯à®‚
Arjuna
Girl/Female
English
Feminine of Marlon;'Woman from Magdala. '.
WATCOM
WATCOM
WATCOM
WATCOM
WATCOM