 
				Attenda Limited
						Cisco Systems Norway AS
						Colt Telecommunications
						Dante
						Easynet Group Plc
						Equinix (Services) Limited
						Extreme Networks
						France Telecom
						Global Crossing (UK) Telecomms
						Griffin Internet
						Janet (UK)
						KDLevel 3 Communications Ltd
						DI Europe Ltd
						London Internet Exchange Ltd
						Milan Internet Exchange
						MYNIC Berhad
						Nominet UK Ltd
						Research Machines plc
						Ripe NCC
						Spitfire Network Services Ltd
						TalkTalk
						Telecity
						Telecom Italia Sparkle S.p.A
						Tiscali International Network	
						Yahoo! UK Ltd
						
					
 
				
					Aircom International Ltd
						Alcatel
	
					BT plc
	
						Carphone Warehouse
							Ericsson
						Fujitsu Telecommunications Europe Limited
						Gamma Telecom Ltd
						Hutchison Team Telecom Ltd
						Inmarsat
						Intercall Conferencing Services Ltd
						Manx Telecom
						Mobily
						Motorola
						NextiraOne Belgium
						Nokia Siemens Networks Nederland B.V
						Nokia UK Limited
						NTT Europe Ltd
						Orange
						Samsung Electronics UK Ltd
						Siemens Enterprise Communications
						Simobil Vodafone
						Telecommunications Regulatory Authority
						Telkom South Africa Ltd
							T-Systems VICOS GmbH
							Vodafone
							XLN Telecom
					
 
				   
					BAE Systems
						Boeing
	
						British Airways Avionic Engineering
						Cobham Defence Communications
						Danish Defence Staff
							EADS Astrium
						ESOC
							ESTEC
						Federal Aviation Authority of Nigeria
						General Dynamics
						Ghana Civil Aviation Authority
						Lockheed Martin Corporation
						MOD
							Norwegian Defence Accounting Office
							QinetiQ Ltd
							RAF
							Royal Air Force of Oman
							Selex Elsag Limited
							Selex Galileo
							Thales UK Ltd
							Serco Defence Science & Nuclear
							Surrey Satellite Technology
					
 
				
						Arbor Networks
						Atos Origin
						Cap Gemini UK plc
						Capita Business Services Ltd
						Cisilion Limited
						EMC Computer Systems
						IBM UK Ltd
	
						Invensys Systems (UK) Ltd
						NEC Electronics Europe GmbH
						Steria Ltd
						Unisys
						Zycko Limited
						
					
 
				
						American Embassy
						Audit Commission
						DSTL
						DEFRA
						European Patent Office
							Huntingdonshire District Council
							General Record Office for Scotland
							HM Government Communications Centre
						HM Treasury
						Home Office
							Identity and Passport Service
							Land Registry
						National Audit Office
							Office for National Statistics
							United Nation Missions in Darfur
					
 
				
						 	Bedfordshire County Council
						Cambridgeshire County Council
							Durham County Council
							Gateshead Council
							Ipswich Borough Council
							Merthyr Tydfil County Borough Council
							Royal Borough of Kensington & Chelsea
						 	Somerset County Council
							Tandridge District Council
							Warwickshire County Council
					
 
				
						Bayer
						Genome Research Ltd
						Institute of Cancer Research
						Medical Imaging Group
						NHS
						Norvartis Pharmaceuticals UK Ltd
						Philips Medical Systems
						Sysmex UK Limited
						Wyeth Pharmaceuticals
						
					
 
				
						Arqiva
						BBC
						Economist Group
						Latens Systems Ltd
					
 
				
						Allied Irish Bank
							Bank of America, N.A
							Barclaycard
							Deutsche Bank AG London
						Gambia Revenue Authority
							Hastings Insurance Services Ltd
							HSBC Bank plc
							Intelligent Finance
							WorldPay Ltd
					
 
				
					Accenture HR services
					Amnesty International
					Cadbury Schweppes
					DHL
					EnergiMidt
					G4S
					International Olympic Committee	
					Kingston University	
					London South Bank University
	
						National Grid
						NPOWER Yorkshire Ltd
						RWE Systems UK Ltd
						Shell IT International Ltd
						University of Westminster
						WesternGeco AS
						
					
 
				
						Aker Subsea Limited
						Berwin Leighton Paisner Ltd
					Canon Europe Ltd
						E.ON UK Grain Power Station
						Europcar UK Ltd
							Hurstpierpoint College
							Kimberly-Clark European Services
							Late Rooms.Com
							Magnox Electric Ltd
							NEC Electronics Europe GmbH
							Oxford Brookes University
							Saudi Aramco
							SITA
							United Utilities Networks Ltd
					
 
				
						Amadeus
							BOC
							CGG Veritas
							EDF Energy
							Gas Transportation Company
							Intercontinental Hotels Group
							Nike
						London College of Fashion
						Metropolitan Police
							New York Stock Exchange
							RSPCA
							Schlumberger Cambridge Research
							TFL London
						Waha Oil Company