Detectortesters is a designer and manufacturer of testing technology for fire detection systems. In-house expertise across a range of technical disciplines means they are able to constantly innovate and develop new technology to bring new ideas and solutions to both users of their products and anyone with a responsibility for fire safety.

Detego Global is the company behind award-winning Digital Forensics, Case Management, and Endpoint Monitoring solutions that are trusted by the military, law enforcement teams, intelligence agencies, and enterprises around the world. With the ever-increasing use of digital devices and the corresponding mass of data that are created, solutions have become the preferred choice for rapidly acquiring and analysing.

Deterrent Technologies was founded in 1982, providing integrated electronic security systems, design, installation and service. They offer services to a vast variety of corporations, including pharmaceutical, financial, telecommunications, manufacturing and real estate sectors.

DeterTech is an award-winning risk management company that uses proprietary technology-based solutions to deliver material cost savings for clients operating nationally in the infrastructure, construction, vacant property, and other sectors, across a range of security products and services.

Detrios designs, delivers and supports integrated access control and business system solutions to meet the toughest challenges.

Deutsche Telekom provides fixed-network/broadband, mobile communications, Internet, and IPTV products and services for consumers, and information and communication technology (ICT) solutions for business and corporate customers.

Developing Solutions is focused on protocol development, test, and traffic analysis. They have developed dsTest, a software platform for the rapid deployment of protocols stacks, intended for performance and functional test.

DevelopIntelligence provides technical training for software developers and related talent in more than 300 subject areas. They help enterprise organisations onboard, upskill and reskill tech talent with programmes customised to the stack, culture, and goals.

Development Trading Company (DTC), a highly regarded first company specialising in the field of security services and printing in the Gulf region, largely focuses its activities on security printing, security materials, access control and machinery, currency printing, passports, ID cards, along with handling and maintaining sensitive government security documents.

Deveryware is the French expert in investigation technologies and services for global security. The group’s offerings encompass legal and digital investigation, real-time geo-localisation platforms, cyber security, combatting fraud, crisis management and emergency communications. At the service of companies and states, they offer a complete range of solutions for the security of goods and people.

Device Authority is a provider of Identity and Access Management (IAM) for the Internet of Things (IoT) and Blockchain. The Company also provides solutions such as data security, network access control, credential management and much more. Device Authority manufactures innovative smart, connected devices with robust security integrated from the outset.

Device Smart Ltd. have been developing Monitoring and Control Software & Middleware Platforms for over 15 years before cloud, before IOT, before "smart anything" was a buzz word.

Incepted in the year 2017, DevRAy are manufacturing a world-class range of CCTV Cameras. They are also proficient in bringing out a wide range of Wireless Ip Cameras, Dome Camera and, Bullet Camera & Switches etc.

DFB Security is a leading Security Consultancy provider of security, investigation, training, operational and expert witness services. It provides bespoke security and investigation solutions to public sector, retailers, solicitors, private Businesses as well as charities and voluntary organisations across Ireland.

DG Concept was founded in 2021. Specialising in the design and implementation of physical barrier projects, DG Concept Gunnebo Partner supports the installation of security equipment linked to access control systems by proposing the right products.

CCTV Surveillance, biometric Time-Attendance & access control,PA Solution,VDPs and MVDPs,intruder & burglar alarms, home & gate automation, fire alarm, VoIP solution,FTTH,perimeter mapping,wireless networking,metal detectors,financial solution & structure networking,gateway,UTM,load balance,AAA authentication gateway,PTP connectivity, PTM connectivity,genuine software & licensing(OEM /MOLP,Server &Client solution, Educational ERP etc.

DIADEM is a 10-year-old company with over 25 years of experience in pedestrian and vehicular obstacles. Its maintenance and repair service covers all brands on the market, with guaranteed on-time delivery. From maintenance and repair to product development and adaptation, the teams can support all projects.

Dial-N-Document is web-based documentation system provider that interfaces with services for a secure Electronic Visit Verification (EVV) solution. Dial-N-Document provides accurate time & attendance, biometric voice verification, Near Field Communication technology etc.

Diamond Security Systems (UK) Ltd is a specialist CCTV design, installation and maintenance company.

Dictograph is a 20-years old locally owned and operated security company providing a wide range of services for their clients. With 24/7 Dispatch, Dictograph's Professional trained Guards and Patrol service can respond to any need at any time in the Tucson and surrounding areas.

Digi-Key Corporation is one of the fastest growing distributors of electronic components in the world. The company has been committed to offering the broadest selection of in-stock electronic components including access control systems, as well as providing the best service possible to its customers, aiding engineers through the entire design process, from Prototype to Production.

DigiBird manufactures an extensive line of Video Wall Controllers and Digital Matrixes. They meet the demands of commercial and high-end residential markets with their specialisation in ProAV Solutions, Digital Signage Solutions, Video Wall Solutions, Video Wall Controller, Hybrid Matrix Switchers, Edge Blender, Seamless LCD, Control/Command Room Solutions, and Creative video wall.

DigiCert is a global provider of high-assurance digital certificates. The company simplifies SSL/TLS and PKI, and provide identity, authentication, and encryption solutions for the web and the Internet of Things. DigiCert specialises in providing solutions required dealing with threats and securing identities across a network.

Digital Harmonic is a pioneer in the space of image and signal processing. Leveraging its proprietary and patented technologies, Digital Harmonic provides advanced analytics of images and signals yielding unprecedented insights that drive time-sensitive and critical decisions for its customers in the Defense, Intelligence Community, and Healthcare sectors.

Headquartered in Frisco Texas, Digital Horizon Solutions (DHS) is a wholly owned subsidiary of Keri Systems Inc., one of North America's largest and best known independent providers of access control and integrated security systems. With over 30 years industry experience, the DHS team has developed Enterprise solutions for airports, military installations, government facilities, universities, schools, hospitals and fortune 500 companies.

Digital ID specialises in all things ID and have stock from some of the biggest names in the industry. Digital ID is one of the leading providers of ID card printers from an array of respected manufacturers, including Magicard, Datacard, Evolis, Zebra and more. The company offers access control and smart cards, ID card and visitor systems, printable and printed ID cards, software, as well as accessories.

Digital Locksmiths Limited was founded by two former members of Smart Card Solutions: Sean Kelly & Martin Strauch. The Digital Locksmiths offer an unrivalled, independent capabiltity to help our clients provide the highly reliable, feature rich and cost effective products that customers demand.

Digital Monitoring Products, Inc. is a family-owned manufacturer of electronic burglar/fire/access products. Since 1975, the company has designed, built, distributed & supported the products from headquarters in Springfield, MO. DMP offers intrusion control panels, wireless, network and cellular communications, access control, central station fire alarm control panels, DOD SCIF or high security IDS systems, intrusion systems and more.