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 Fraud Investigations (DFI) conducts independent and objective investigations of fraud allegations for international development (NGOs and non-profits) and contracting organisations.

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.

Devo is the only cloud-native logging and security analytics platform that releases the full potential of your data to empower bold, confident action. With an unrivaled scale to collect all of your data without compromise, speed to give immediate access and answers, and clarity to focus on the signals that matter most, Devo is an ally in protecting an organisation today and tomorrow.

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.

Based out of UAE, DG World is a renowned global high-tech Robotics and AI solutions company. They provide a wide range of turn-key, autonomous vehicles, AI and other technology solutions. Other solutions include advanced technology, robots, IoT, industrial and hybrid drones.

DGS is managed and operated by this team who take a real hands on approach to all the operational aspects of each and every contract. DGS Service Solutions provide a range of outsourced Security, Cleaning and FM Solutions to a range of customers including shopping centres, offices, factories, and retail outlets.

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.

DHS Systems Int'l Ltd, with its business title of DHS Systems International, is the rebranded name of MilSys (UK) Ltd. This title better reflects that role of the company, which is to provide DRASH mobile infrastructure capabilities and solutions for defence, security and crisis relief organisations worldwide. DHS Systems Int'l Ltd remains a subsidiary of DHS Technologies LLC, which is based in Orangeburg, New York.

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.

Dialogic has been serving both the enterprise and service provider markets. Dialogic also develops technologies that enable operators to give their subscribers a reliable, seamless, and extremely enjoyable communications experience across countless devices connected on a wide variety of networks.

Diamond Security Fencing have been servicing Western Australian customers for well over nine years. With combined 35 years worth of industry experience, Diamond Security Fencing guarantees quality fencing installed to the highest standard.

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.

DiffusionData is a pioneer in real-time data streaming and messaging solutions. Founded to solve the real-time systems & application connectivity and data distribution challenges experienced by companies worldwide, the company has an international team of business and technology experts. The company’s flagship offering — the Diffusion® Intelligent Data Platform, makes it easy to consume, enrich, and deliver data reliably.

Dig security provides the first and only solution that combines data security posture management (DSPM) with real-time data detection and response (DDR) – a full-encompassing solution that helps discover, classify, protect, and govern cloud data.

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.