North Central Security Services Inc. provides various security services, such as installing security systems at homes, commercial centers, etc.

North London Fire & Security Systems Ltd provides specialist services in the design, installation & maintenance of Intruder & Fire Alarm Systems, CCTV, Door Access & Automated Barrier/Gates, extinguisher and ememrgency lighting systems. Based in London, the company is an NSI NACOSS Gold approved installer, and holds a certificate of quality assurance meeting the requirements of BS EN ISO 9001:2000.

The North Texas Alarm Association (“NTAA”) is a non-profit association. The association was originally founded by a group of concerned alarm company owners that took a proactive stance to the false alarm issue. Today, through the direction of its leaders and members, the NTAA has evolved into a professional industry association promoting, educating, and safeguarding the interests of security and fire alarm industry and its customers.

Northern Alarm Protection Co. Ltd. specialises in creating security solutions for the commercial and industrial sector. The company offers CCTV security systems, access control systems and alarm monitoring services. Northern Alarm Protection is a pioneer in installation and monitoring of security protection systems.

Northern Security Alarms has been installing and maintaining security systems including CCTV systems, access control, fire alarms, and nurse call systems etc. The company have been protecting homes and businesses throughout the Highlands & Islands and Grampian regions of Scotland. Northern Security Alarms have established ourselves as one of the major players in the fire and security industry.

Northumberland Media Centre provides tailor-made security solutions for customers in each sector and specialises in the design, installation and support of security systems. NMC installs CCTV and burglar alarm systems in homes and businesses.

Through research and design, Northwood Technology Ltd is at the forefront of matching the correct technologies for specific project requirements, fully utilising the creative resource team of experts in the areas of business analysis, design, workshop management, training and delivering in accordance with agreed criteria.

Nova Alarm Ltd specialises in installation and maintenance of security systems such as CCTV, fire detection systems, access control, remote signalling, and Burglar alarms etc. The company mainly provides installation services to the local government and domestic clients. As an NSI (NACOSS) Gold Approved Company, Nova Alarm Ltd adhere to the latest European Standards.

Novadis designs global IP-based integrated security solutions ranging from video surveillance, intrusion, access control, perimeter protection, RFID, and Video Analytics. Based in Levallois-Perret, the company's business solutions are based on open, integrated and evolutive systems that lead to a multi-layered Security Systems integrated to the Information System.

Novatron Security Distribution SA is located in Athens, Greece and it is considered a major distributor of security systems in the area. Partnerships include DSC, Dahua, Foscam, Zettler, HID, IDTeck, ZKTeco and more.

NSI Distribution is an industry wholesale distribution company with a strong background in engineering design and manufacturing of low voltage electronic components. NSI Distribution offers a comprehensive line of Voice & Data, Security, CCTV, Access Control, and Automation products as well as the essential installation and peripheral products, creating a “one-stop-shopping” environment for its dealer network.

NSP Security is a leading multinational provider of access Control and security systems. The NSP brand is synonymous for providing outstanding service, and is trusted to provide intelligent locking and security solutions to the student accommodation, hotel, hostel and commercial sectors.

Located in Tigard, Oregon Nu Tech has been providing outstanding custom software development, engineering services, database, cloud, network, and support services for over 20 years. The company's AlarmDecoder easily controls and monitors DSC/Ademoc/Honeywell Vista alarm systems with a PC, HA system.

Nullcon was conceived from null – The Open Security Community and the largest active security community in India. Nullcon is an extensive platform for the exchange of information about zero-day vulnerabilities, latest attack vectors, and other cyber threats. Here, security researchers and experts from various fields discuss information security, along with showcasing multiple offensive and defensive security technologies.

NUTEC SECURITY SYSTEMS LTD has been manufacturing and installing CCTV, access control systems, detection systems, and home alarms etc. The company has been providing its security systems to Schools, Health and Local Authorities and corporate companies both large and small. NUTEC SECURITY SYSTEMS LTD installs and maintains to current European Standard PD6662.

NuTech is the most established and largest force dedicated to retail loss prevention, working with the top Fortune 500 retail companies. Nutech has also had a long standing relationship with the U.S. government, protecting many of it's agencies and defense-related operations, including the largest defense contractor Lockheed Martin who calls upon NuTech everyday to protect it's facilities throughout the U.S.

Citadel Security BV has grown into a total supplier of security systems for private individuals, shops and companies. They are not only active in Haarlem or Amsterdam, but throughout the Netherlands and even the Benelux.

NW Cabling LLC is a low voltage electrical contractor specialising in system design and engineering. they also implement multi-site deployments and campus environments. Founded in 2010 and headquartered in Spokane WA, NW Cabling has completed projects throughout the Pacific Northwest.

NXGEN Technology AG is a Swiss start-up with a focus on Connected Enterprise, specialising in security, IoT, AI / ML. NXGEN was founded at the beginning of 2019 and launched the GENESIS service at the end of 2019 with a focus on SaaS Alarm & Event Management.

O' Rourke Security Systems supply and install the latest advanced systems including intruder alarms, smoke alarms, CCTV, access control systems, gate automation etc. Based in Leitrim, the company offers high quality installations at competitive rates. O' Rourke Security System offers services to both domestic as well as commercial sectors.

Oakpark Alarms specialises in installation and maintenance of of access control, CCTV, fire alarms etc. The company offers services both commercial and domestic locations. Oakpark Alarms cover all areas of Dorset, Hampshire, Berkshire, West Sussex and Wiltshire as well as providing commercial systems over a wider area still. The company ability to certify installations resultant from their membership of the SSAIB and BAFE approval.

Oakpark Alarms Security Services Ltd specialise in the Design, Supply, Installation,Service and Maintenance of Intruder Alarms, CCTV, Door Access, Fire Alarms, Emergency Lighting, Fire Extinguishers, Fire Suppression Systems and Automated Gates, Barriers and Bollards, Perimeter Security and Fencing. Based in Winslow, the company work varies from garden sheds to Hotels.