Object Reservoir  "a technology-based professional services organization that specializes in Dynamic Reservoir Characterizationâ„¢. Object Reservoir helps oil and gas companies maximize ROI "

Oil & Gas Information Systems Inc.  "chartered to provide cost effective accounting solutions for the domestic oil and gas industry. As the system was enhanced, an international accounting application was added opening up worldwide markets in addition to the domestic markets. Over the years, many other program enhancing applications have been added. "

Oildex.Com  "Oildex Connectâ„¢ is a workflow solution and information exchange for budget and contract approval, ordering, invoice processing, and revenue reporting -- activities that consume most of the resources within oil company accounting and lease management departments. "

Oilfield Data Manager (ODM) "designed to allow the geoscientist or engineer to integrate, interpret and display a wide range of reservoir data. Using a highly visual interface, ODM allows well logs to be interactively interpreted with results immediately correlated and remapped."

Oilware, Inc.  "a provider of data conversion software products, data management consulting, and data conversion services. Oilware specializes in DLIS, LIS, LAS, ASCII (of all types), BIT, POSC Exchange Format (PEF), and Geoshare data interchange and conversion."

OmniCon  "an accurate, powerful, and customizable Metric conversion software program for Windows 98/ME, Windows NT/2000"

OpenSpirit  "..changes the way oil and gas companies use information and how software developers build applications....a platform independent plug-and-play framework that allows best-in-class applications from a variety of software vendors to readily interoperate."

OSI Software, Inc.  "a leading global supplier of software products for managing information in the process manufacturing industries. "

Overload Services Inc.  "a full-featured software and engineering support company with more than 50 years of combined accumulated experience in the Instrumentation Design, Documentation and Maintenance discipline...based in the heart of the petrochemical industry "

P2 Energy Solutions  "a leading enterprise application solution and consulting services provider focused on delivering solutions that meet the financial, accounting, and property management needs of exploration and production companies worldwide."

Palisade  World's leading developer of software for risk and decision analysis

Paradigm Geophysical  "the Geoscience Knowledge Company"

Parallel Geoscience  "developing high quality, low cost geophysical data analysis software tools for the field and desktop computing environments."

PathTracker  "Directional and Horizontal Drilling survey Calculation Program."

PayZone  "An interactive drilling simulator for training and operations optimization."

P.E.Inc.  "focuses on developing Visual Basic applications for specialized industry needs. A typical program will usually be small in scope and directed to a specific customer requ

Peloton Computer Enterprises, Inc.  "a world leader in the development of petroleum engineering, government form filling, and labeling software."

Performance Sciences, Inc. (PSI)  "principle activities of PSI include providing production data analysis software, consulting, and training services to the petroleum industry."

Petcom Inc.  "is a privately held Texas corporation that provides premium petrophysical software systems and consulting services to the petroleum industry."

Petec Software & Services AS  " a subsidiary software and consultancy company within the Rogaland Research group" maker of DrillBench.

PetEng Calculators  a new site, "dedicated to providing petroleum engineers, geologists and technologists with the ability to perform medium-complexity computations, graphics and data access online."

Petris Technology  WINDS (Well Information Network Delivery System) to handle the search and retrieval of digital log data and scanned log images over a local or wide area network."

Petro-Soft Systems Ltd.  "a Canadian company that develops innovative Reserves Management software. Our Phoenix Reserves Management Suite provides the Oil & Gas producer with a complete corporate view of their assets. "

PetroDynamics, Inc.  "providing expertise in:Sequence Stratigraphic Interpretation of Well Logs, Outcrop and Seismic Data; Basin Modelling and Source Rock Prediction; Structural Interpretation of Well Logs, Outcrop and Seismic Data ; Software Solutions."

Petroleum Experts  "develops the Integrated Production Engineering Toolkit IPM using the software GAP, PROSPER, MBAL, PVTP, REVEAL and OpenServer. The IPM suite of tools have become the standard field optimisation and prediction toolkit for modelling the reservoir tanks, all the wells and the surface gathering system within many of the major operators worldwide. "

Petroleum Software Technologies  formed ...by...geoscience professionals to develop fast and easy-to-use tools that would revolutionize the way digital log data are viewed and used.

Petrolink Services  "excels in the rapid transmission of wellsite data from any land or offshore site to any office in the world. "

Petrosys  "a leading supplier of interactive software for geologic and geophysical interpretation. Our customers range from small independents to large multinational oil companies, universities, consultants and research groups. We develop software for both Unix and Windows and have sales and support offices around the world including USA, Canada, Europe, MiddleEast, South America and Australia/Pacific regions."

Petroway, Inc.  "specializing in engineering software and books for the international petroleum industry." Automate for Windows^TM, WinBOAST, and Modern Well Test Analysis

PFR Engineering Systems, Inc.  "software is used in the Petroleum, Petrochemical and Power industries around the world to evaluate thermal equipment such as fired heaters, boilers, heat exchangers and heat recovery systems."

PHH Petroleum Consultants  "an international petroleum consulting company and software developer located in Calgary, Canada.... PHH offers a full range of services relating to reservoir performance analysis and optimization using numerical simulation."

Platte River Associates, Inc.  "developing basin modelling software since 1985"

Practical Log Interpretation  Yalcin Pekiner's site with programs on Log Interpretation, Clay type, and Lithology. Also in Turkish.

Process Ace Software "Palm OS Software for Engineers. Applications include steam tables, pump calculations, steam turbine calculations and gas fired heater calculations."

Process Associates of America: engineering and scientific tools and calculation aids "the web site is unique for its wide collection of on-line and free (!) top quality engineering and scientific tools and calculation aids."

ProData Online  dedicated to providing a data collection system that provides accurate and up-to-the-minute production data “from the Wellsite to the Website” while providing our clients with the best in customer support and training.

Prode Software  "ideas that work"

Production Access  "provides solutions for optimizing oil and gas operational work flows. Operations Center is the premier software solution for fully integrating oil and gas operating field data in one single cost effective data engine."

Public Petroleum Data Model Association (PPDMA)  "the business driven standard"

Questa Software Systems, Inc.  "Petroleum Industry Solutions"

R & R Visual Inspection Services  RapidView Software Systems

Resources Engineering Systems Inc. 

RLA GeoSystems  "specializes in GPS- GIS geopositioning solutions. "

Rockmate Technical Service  "Providing software solutions to the extractive industries since 1985." dXmCubed is a ground modelling system; a free fully working demo copy  of the software is available.

Rockware Inc., Geological Software  "the foremost developer and distributor of inexpensive earth science software applications"

Roughneck Systems, Inc.  "Office Accounting Software for Oil and Gas Operators"

Roxar ASA  "a leading reservoir technology company providing innovative products and services to the upstream oil and gas industry"

RSI  "Dynamic Simulation and Advanced Process Control Technologies"

Russian Petroleum Consultants Corp.  "offers petroleum reservoir management, integrated reservoir studies, field operations, and software consulting services. "