D.W. Rourke & Associates specialise in access control, CCTV, intrusion and ULC listed alarm monitoring for both commercial and industrial clients. Operating out of Calgary, Alberta since 1985, D.W. Rourke & Associates were one of the first authorised dealers of the AMAG product line in Western Canada. Over time the company's products and services have evolved to include the industry leading standards in security systems.

D/A Central is a security systems integrator for access control systems and surveillance security systems. The company provides security expertise for system design, consulting, and integration of a multiple manufacturers’ equipment into one system.

D3 develops the most advanced incident reporting, investigation case management, computer aided dispatch (CAD), security post orders and guard tour systems on the market. The system promotes the efficient and consistent gathering of critical data that automatically triggers appropriate actions, ensures compliance and enables analysis using built-in business intelligence (BI) for predictability modeling and analytics, optimising operations.

D3 Security Management Systems is a privately held company headquartered in Vancouver, British Columbia, which develops and supports the most advanced incident reporting, investigation case management, computer aided dispatch (CAD), security post orders and security guard tour patrol systems on the market.

Dakota Alert is a leading manufacturer of wireless alert products. The MURS products allow you to communicate and monitor activity over long distances. The base station radio and the hand held units are perfect for security personnel and the accompanying transmitters allow for complete monitoring of all properties.

Dallmeier is the world's leading provider of professional video security technology and network-based IP video surveillance systems. The company has been developing and manufacturing high-quality complete solutions for the CCTV/IP area.

As a privately held software company and biometrics industry leader, Daon was founded to build biometric software products that would allow people to authenticate themselves in person or online in a secure, convenient and flexible manner, thus eliminating the threat of security breaches and device fraud. Daon offers IdentityX Platform, a universal authentication platform for mobile devices.

DAQ Electronics is a leader in the field of high-speed electronic automation, serving applications in both the physical security and SCADA markets. Its security technology provides advanced solutions for access control and intrusion detection and has been installed in some of the most secure locations in the world, including US military bases and the Pentagon.

Darkcad. Tec. Corp. is a security systems integrator in the USA. The company provides access control, perimeter control, video cameras & recorders, burglar alarm & fire and people screening etc. products from companies like Hikvision, Lutron, Vantage Controls, Honeywell Security, Panasonic etc.

Darktrace is a AI company which deals in cyber security, Intelligence and machine learning. The Enterprise Immune System uses machine learning and AI algorithms to detect and respond to cyber-threats across diverse digital environments, including cloud and virtualised networks, IoT and industrial control systems. Some of the products developed by the company include Darktrace Enterprise, Darktrace Industrial, Darktrace Cloud and Darktrace SaaS.

Data Installers Inc. is an IT infrastructure design and network cabling Installation Company. The company specialises in the sales, service, and installation of structured voice and data cabling systems, voice and data integration, fiber work area products plus fibre optic cabling systems. Its complete CCTV surveillance system solutions provide enables users to monitor and view their office or home with computer or smartphone.

Databuoy offers location data and time stamps that instantly notify subscribers about an event and include reports that are time-stamped and geo-coded. They also connect with companies and talented individuals that are inspired to create new intelligent sensing applications and jump into the future of integrated security, safe cities and smart environments.

Datacard Group collaborates with customers to create highly secure financial card programs and government ID initiatives, as well as secure ID programs for education, corporate security and many other markets. They bring unmatched experience and expertise to every engagement, including industry best practices and a deep understanding of complex operational issues.

Datacom is a Texas based manufacturing representative to the structured cabling, wiring and security industries. It provides a complete, end-to-end communications and security solutions services to clients. Headquartered in Dallas, Texas, Datacom Sales and Associates, Inc. effectively services the Texas, Oklahoma, Arkansas and Louisiana market areas and maintains additional offices in Houston, San Antonio and Austin, Texas and Tulsa, Oklahoma.

DataGear is a provider and integrator of IP video surveillance systems. Their approach to integrating state-of-the-art camera systems is unique because they offer systems on both wireless and wired networks. Their integration methodology will not only save customers in hardware costs, but on installation and on-going maintenance costs as well. DataGear ensures proper network connectivity and power sources utilisation for successful installation.

Data Link Technology Services, LLC (Data Link) is a voice and data communications infrastructure design, installation and service company. It is a structured cabling company for voice, data, video, sound and security. The company offers services for security systems, CCTV, access control systems and more.

Dataminr transforms the Twitter stream and other public datasets into actionable alerts, providing must-know information in real-time for clients in finance, the public sector, news, corporate security, and crisis management. Dataminr has pioneered a ground-breaking technology that identifies, classifies, and determines the significance of real-time information and delivers alerts and verification analytics through high-value applications.

Founded in 1996, DataStrait Networks helps connect everyone involved in the data communications infrastructure business. DataStrait Networks is now offering 3VR products to security dealers throughout North Dakota, South Dakota, Minnesota, Wisconsin, and northern Illinois. It has introduced game-changing new technologies, installation practices, supply chain management, and network design.

Founded in 1981, Datawatch Systems is a full-service commercial office building access control systems provider serving a roster of more than 2,250 buildings domestically and globally. The heart of the company’s automated system is its 24-hour computerised monitoring center that enables multi-level security customised to the needs of individual clients.

David-Link targets the wholesale and OEM/ODM market supported by quality products with competitive prices direct from the manufacturer. Along with the advantages in prices and quality, David-Link also offers customisation of products and software that best meets individual business’ needs.

Inconsistent processes can generate errors, cause poor data, create problems with members, and affect the overall health of your organisation. Daxko’s professional services team has worked with more than 1,000 centres to develop and implement best-in-class operating procedures so that you operate as effectively as possible.

Day Automation Systems is the USA based security solutions provider. The company provides video surveillance, IP-based video surveillance systems, license plate recognition, advanced video analytics, access control, intrusion detection, HVAC solutions and utility metering to premier school districts, colleges, universities, and corporations.

DC Professional Systems specialises in custom electronic systems installation & integration for home and office. They also provide installation and maintenance of access & control your security system, video cameras, audio system, thermostat, lighting & more using computer or smart phone, from anywhere.

DC Security Products manufactures communication and video devices for digital-based LAN/WAN and Internet as well as analog-based communication products for dialup and leased line Telco Environments along with dry-copper based proprietary local area networks that are AC/DC powered for the communication and security Industries.