Accenture
USA; management and technology consulting organization

ACDAT System Services Ltd.
Canada; database, networks and systems management to information system departments in the oil and gas industry

ADB Systems
Norway, software vendor focused on integrated eProcurement and Enterprise Asset Management software solutions

Advanced Digital Data, Inc.
USA, accounting software for the petroleum, propane, gasoline and lubricant distribution industries

Advanced Extraction Technologies, Inc.
USA, technology licensing, engineering services, Enhanced NGL Recovery Plants to Refinery Off-Gas Recovery

Advanced Fuel Filtration Systems, Inc.
USA, fuel testing service

Advantage Energy Software
USA, software and services for petroleum marketers and convenience store operators

Advantica Technologies Ltd.
UK, technology and engineering solutions for gas networks

AEA Technology
UK, advanced technology, consultancy and technical services

AIMS, Inc.
USA, software and services for the petroleum products distribution industry and the related convenience store industry

Alba International
UK, personnel recruitment and contracting to the oil and gas industry

Allegro Development
USA, software, e-commerce solutions

Alphatania
UK; training programs for gas professionals

Altra Energy Technologies L.L.C.
USA; energy management systems; electronic trading services; Streamline; Chalkboard; Gas Management System; Engenius, e-commerce

Ami Consultants Inc.
USA, refinery planning software, PetroPlan

AMP Control, Inc.
USA, turn-key engineering, programming, fabrication and installation, eTankTS