Cirium is the industry pioneer in aviation analytics; helping the aviation industry understand the past, present and predicting what will happen tomorrow in air travel.

CIS Security initially operated as a security management and commercial investigation specialist. In 1972, the company joined the manned guarding industry when customers found it difficult to find a suitable security company to provide professional security personnel with the ability to fulfill the recommendations/positions proposed by their experts.

The UK’s City Alarms specializes in the repair of old security systems. The company also offers intruder alarms, CCTV systems, access control, fire detection systems, door entry systems and locksmith services.

CitySync was formed in the late 1990s specifically to develop innovative technology solutions in the field ANPR / LPR. CitySync automatic number plate recognition (ANPR) family is a part of ISS’ industry leading computer-enabled detection (CED) products.

CIVIC Security supplies, installs and maintains a complete range of security, communications and electrical services. The UK based company provides CCTV, access control, fire alarms and intruder alarms to residential, commercial and industrial sectors, including local authority housing, housing associations and government departments.

Clantect delivers products and services capable of solving and overcoming major challenges and threats in the security, defense and maritime industries, in the UK and throughout Europe. Their motion detection systems is a key component in the prevention of the illegal cross-border entry of people, by detecting hidden human presence in heavy goods vehicles.

Clarion Security Systems Ltd is a security company in Manchester and are dedicated to the design, installation, service and maintenance of CCTV, Access Control, Intruder Alarms, Intercom, Visitor Management and Integrated Security Systems for commercial enterprises.

Clarion Security Systems is a security company dedicated to the design, installation, service and maintenance of CCTV, access control, intruder alarms, intercom, visitor management and integrated security systems for commercial enterprises.

Class A Alarms is a security company providing CCTV, access control and intruder alarm systems to businesses and home owners across the East Midlands. Class A Alarms is NACOSS Gold and BS EN ISO 9001 accredited.

Classwatch supplies mobile video systems and fixed video systems for the UK education sector. Classwatch is an audiovisual recording system that allows teachers and students to learn from and share their classroom activities.

Clear Sound Alarms are professional electronic security systems provider in the UK. The company installs CCTV, intruder alarms, access control, remote monitored CCTV, fire alarms, induction loops and public address systems for government authorities, police authorities, council authorities, blue chip companies, chemical factories, newspaper publishers, and vehicle manufacturers etc. Clear Sound Security are NSI NACOSS Gold approved.

Clear Vision Technologies deal with transmission for industrial and commercial networks. IP, wireless and fibre optic transmission for CCTV & surveillance, industrial control and security systems are the main services that the company provide. Ethernet switches, media converters and line drivers including 10/100 and Gigabit as well as PoE units are some of the products of this company.

Clearview CCTV Ltd is a security systems installation & maintenance company in the UK. The company offers services like CCTV, barriers, electrical security systems, fire protection PAT testing and alarm, access control etc.

Clearway are the UK's experts in the security of vacant commercial and residential properties with a full range of security solutions to suit every requirement. With security teams located throughout the country, Clearway offer a same day and nationwide service when required. The services include vacant property security such as keyless security doors, monitored alarm systems, temporary CCTV systems, security guards, property guardians, etc.

Cleveland Security is a professional security systems installer. The UK based company provides CCTV systems, access control, fire alarms, central station monitoring, central station surveillance etc. for domestic, industrial and commercial installations. Cleveland Security is NACOSS gold approved installer.