Turnstile Security Systems has been designing and manufacturing tunrstiles, swing gates, handicap gate systems, post & rail systems, optical turnstiles, case prtector systems, locking closure gate systems, portable post systems etc.

Tusco, Inc. is one of the leading Suppliers of Vehicular Wedge Barriers, Crash Rated and Non-Rated Bollards, Beam Barricades, Ornamental Cable Fencing, Prefabricated Guard Booths, Protection Gates, Commercial Fencing, Automated Access Controls Systems and Portable Vehicle Barriers with Certified Installers, Contractors & Technicians.

Tutela, Inc., headquartered in Brunswick, Georgia, was founded in 2002 to design, implement and support integrated security systems for national and multi-national corporations around the globe. Tutela's services include access control, surveillance, security systems & intrusion detection systems as well as fire alarms & safety systems.

A business unit of Tyco International Ltd., Tyco Integrated Security is North America’s leading commercial security systems integrator, providing security and business optimization services to more than 500,000 customers. Headquartered in Boca Raton, Fla., Tyco Integrated Security has more than 10,000 employees throughout North America.

Tyco Retail Solutions delivers integrated value-based store performance and security solutions. The company is the leading global provider of retail performance and security solutions, deployed at over 80 percent of the world’s top 200 retailers ranging from single-store boutiques to global retail enterprises.

Established in 1992, Tyrell Security Systems provides various services, such as alarm systems, video surveillance systems, sound systems as well as installing protection devices for carbon monoxide, propane gas, low and high temperature and water alarms.

UL is a global independent safety science company offering expertise across three strategic businesses: Commercial & Industrial, Consumer and UL Ventures. UL certifies, validates, tests, inspects, audits, and advises and educates. The company serves various industries including life safety and security, fire suppression, HVAC, lighting, wireless, hazardous locations, etc.

Ultimate Security Products was founded in 2010 by a group of industry veterans with over 85 years of combined experience in the life safety and security market. The company provides integrators, security dealers and distributors with the finest, "Best in Class" products available that will help customers to expand their business and profits.

Ultrasafe is a "one stop" center for all security needs. The company has specialists that range from consulting, training and computer forensics to Integration and high technology fence installations.

Uni-Tech Communications is a full service Panasonic Business Telephone Systems Dealer. The company specialises in low voltage structured cabling (Cat 5e, Cat 6), telephone systems, voicemail, video surveillance (CCTV), fiber optics, audio & video applications, paging, and intercom.

Unilux Ltd was established in 1990 as a corporation in Maryland, USA as a manufacturer’s distributor for video security products. Today, we are direct distributors for over 30 major security equipment manufacturers. Unilux Ltd works continuously with the leading manufacturers in the design and integration of products to meet the specific needs of the customer.

United Digital Technologies, LLC is a security systems distributor in the USA. The company supplies video servers, IP-based solutions, network cameras, network video recorder/video management software, access control, wireless gear and security accessories etc.

United Security & Control Systems was founded in 1988 as a division of Morrison Mechanical. The privately owned and operated company has grown to be an industry leader in commercial, industrial and residential electronic security. United Security & Control Systems offers products and services including access control, CCTV, industrial process cameras, intrusion detection, UL Central Station monitoring, fire alarm, intercom, maintenance, etc.

Since 1985, United Security Alliance, Inc. (USA) has been an industry leader in the design, installation and service of video surveillance and access control systems. The Mobile Secutity Division of USA provides both mobile video surveillance and real-time GPS fleet vehicle tracking systems. In addition to being a certified systems integrator, United Security Alliance, Inc. has also established direct relationships with the leading manufacturers.

USAG has a wide variety of cameras and accessories for any application. It carries a wide selection of Anti-Vandal, Dome, Bullet, Professional and PTZ cameras, many of which are IP ready.

United Security Services provides guarding services for a wide range of purposes including access control, vehicle patrolling, vandalism prevention, CCTV surveillance, and alarm response. The company's service portfolio covers educational institutes, financial institutions, construction sites, airports, and healthcare facilities.

United Alarm designs and installs the most technologically advanced equipment and systems available, such as security services, fire alarms, carbon monoxide detectors, access controls, etc.

Universal Services of America, founded in 1965, combines an innovative mix of tradition with advanced technology to keep pace with the evolving security needs of today’s businesses. They provide their clients with the best security solutions, personalized customer service and unmatched value available. Services include critical loss prevention, training, access control, CCTV, fire alarm management, intrusion detection and physical security.

As a leader in the global security sector, Unlimited Technology provides reliable solutions that utilize the latest state-of-the-art technologies. The company offers a wide range of security related services globally, from employing security vulnerability assessments to doing a complete and exhaustive custom system fabrication.

Untethered Labs provides wearable wireless technology to the enterprise security and access control markets. With wide applications in IT security, healthcare, law enforcement, and large businesses, its solution, GateKeeper, is the first line of defense for protection against unauthorized use of computers in the workplace.

Urban Alarm is a security alarm company. The company provides security alarm, fire alarm, access control, telephone entry, and video surveillance solutions.

USAG is one of the leading manufacturer & distributor of CCTV products in USA. USAG has a wide variety of cameras and accessories for any application. USAG also provides 24/7 service and technical support to its customers.

UTC Climate Controls & Security is a world leader in providing solutions for fire detection and suppression, intrusion detection, access control and video surveillance, with installation, inspection, monitoring and response solutions for customers worldwide in a variety of application and settings.

Utility Communications Inc. has been providing sales and service of two-way radios and communications equipment that meet the needs of business, industry and public safety.