DLRS Group Security Concepts is Ireland’s largest security printer. Established since 1976, the company has production facilities in the Republic of Ireland and Northern Ireland, servicing the needs of major financial and government bodies.

DOM-UK Ltd. focuses on developing and offering high quality mechanical and access control solutions for residential and commercial applications. They provide smart access control, mechanical and digital locking solutions, including locks, lockcases, digital handles and cylinders, wall readers and terminals, trapped key interlocking systems and anti-tilt systems.

dhf is a not-for-profit trade association for companies associated with Locks & Building Hardware; Doorsets; Industrial Doors & Shutters; Domestic Garage Doors and Automated Gates.

Door Entry Direct Ltd specialises in the distribution of door entry systems of proven quality. The team at Door Entry Direct Ltd have over 25 years experience in door entry phone intercom systems.

Door-Stop offers composite door solutions in a completely different way. They are easy to buy, quick to get hold of, and are easy to sell. Today 90% of Door-Stop’s orders are placed using the 1 minute, 5 step online ordering system. They deliver doors nationwide in just 3 days. Their doors come with an ERA cylinder-free lock which is secure. With a traditional mortice key, the door doesn’t need a locking cylinder because the key engages directly.

DORMA is a globally active supplier of door technology products and systems. The company is the world market leader in door controls, movable walls and automatic door systems. The DORMA Group is subdivided structurally into five divisions: Door Control, Automatic, Glass, Security / Time and Access and Movable Walls. DORMA maintains major production plants in several European countries plus Singapore, Malaysia, China and North and South America.

Dorset Architectural Ironmongers is one of the leading supplier of architectural ironmongery, fire protection products and associated services to clients in both the public and private sector. Based in Dorset, the company product range including access control, hinges, door closers, locking systems, and fire escape hardware etc. DAI work with all the leading manufacturers to provide an extensive range of top quality products for all projects.

Dot Origin Ltd. is a leading European provider of products and solutions in the field of smart card technology. Dot Origin distributes smart card, RFID and NFC solutions from vendors including ACS, Gemalto, HID, Identive and NXP. Headquartered in the UK with US subsidiary, the company has been operating successfully in this market for over 10 years, and has a wealth of knowledge and experience which is used offer comprehensive technical support.

Dräger is a leading international company in the fields of medical and safety technology. Dräger provides firefighters all around the world with state-of-the-art equipment, services and training.

DroneOps specializes in the commercial application of Small Unmanned Aerial Systems (SUAS) and robotics. They research and develop new capabilities for drones to work in the commercial, security and defence arenas.

DRS Technologies is a leading supplier of integrated products, services and support to military forces, intelligence agencies and prime contractors worldwide. DRS holds leading market positions in thermal imaging devices, combat display workstations, electronic sensor systems, power systems, rugged computer systems, air combat training systems, mission recorders, deployable flight incident recorders, and environmental control systems etc.

DS Security is a pioneer UK Security company providing Security Services throughout the United Kingdom. Their security camera systems, access control and asset protection solutions provide a real deterrent and the peace of mind having a full record of any event or problem if needed.

DSSL Group is a specialsits in Closed Circuit Television, Access Control and Integrated Systems. The company expertise in development, installation, maintenance and integration of CCTV, access control (wireless, fibre and hard wired) and perimeter protection systems gained with various organizations.

DSX-Europe is a UK company based in Manchester. The company specializes in distribution of the DSX Access Systems. DSX-Europe offers hardware, software as well as biometrics solutions of DSX Access Systems. With over 75 years of experience in electronic security industry, DSX-Europe's staff are well equipped to help customers with any Access Control requirements.

Durite are the leaders in Vehicle Safety and Auto Electrical Parts with over 5000 products available. Their goal is to provide simple yet effective solutions to their customers. Durite is the UK’s leading brand in auto electrical parts for the commercial and general vehicle aftermarkets, including trucks and vans, marine, agricultural and leisure vehicles.

D.W. Price Security was established in 1998 by the current directors who each have more than 30 years experience within the physical security sector. The products include, door sets, counters, glazed screens of varying type, windows of varying type, transaction facilities and a comprehensive range of ancillary products.

Dycon is the leading provider of advanced multi-signaling products for security industry. Using various technologies, Dycon can provide devices to initiate data transfer through PSTN, GSM, GPRS (TCP/IP) Broadband (TCP/IP) & SMS, and can be used with most alarm control & Alarm Receiving Centre (ARC) equipment. Dycon also manufactures a range of EN compliant security control equipment and power supplies for alarm, access control & CCTV systems.

Dynasystems Limited is a UK-based company that manufactures a range of blast & ballistic mitigation products and systems, including guard towers, walling and barriers, windows, entry control systems and polymer armor. Its products are used in embassies and other diplomatic missions.

E2S is the world's leading independent signaling manufacturer. The company specializes in the design, development and manufacture of high electronic sounders, PA loudspeakers, intelligent voice annunciators, flash alarms, status lamps and manual call points.

Cooper Security, now a part of Eaton, has over 30 years of experience supplying security equipment for residential and business premises. The company is one of the world’s most respected intruder detection equipment designers and manufacturers. Scantronic and Menvier Security are its UK/European brands, which include intruder alarms, movement detectors, voice & digital communicators, and access control systems.